{ "date": "2026-10-15", "issue": 237, "status": "Unmerged implementation with default admission for verified JVM VARCHAR/INT/BIGINT table functions. Aggregate/OVER/nested scalar work under #237 remains open.", "configuration": { "flink": "2.2.1", "jdk": "17", "native_mode": "release + mimalloc", "native_library_sha256": "d55c5bfa509c460a84c76c9bc2b62a4a46575cec32ff4d905847a1e66c4bd786", "parallelism": 1, "heap": "2 GiB", "batch_rows": 1024, "transport": "production IPC; row source and row blackhole sink; both transposes asserted", "warmups_per_engine": 2, "alternating_measured_pairs": 5, "split": { "rows": 2000000, "keys": 65536 }, "group": { "rows": 500000, "keys": 16384 }, "width": "16 characters per token (one \u00e9 and fifteen ASCII x); two comma-delimited tokens per non-NULL input", "nulls": "Every eighth source text is NULL; keys repeat modulo configured cardinality", "query": "SELECT s.k, t.v, t.pos FROM src s, LATERAL TABLE(test_split(s.text_value)) AS t(v,pos); grouped case SELECT s.k,t.pos,JSON_ARRAYAGG(t.v) ... GROUP BY s.k,t.pos", "measured_boundary": "executeSql(insert).await(): planning, submission, source, function evaluation, both transposes, native state where applicable, row sink and job completion. Cluster boot/configuration and metrics inspection outside timing. Each alternating pair owns and closes its metrics cluster so completed host aggregate state cannot remain reachable across pairs." }, "previous_revision": "b965b8bf0c97450f6971f20db0fe6abc6bbac8ae", "previous_revision_control": "Separate checkout of actual preceding code with identical benchmark source; function queries retain fallback and assert zero native substitutions.", "series": { "pruned-split": { "stock_trials_seconds": [ 1.357145337, 1.346728171, 1.357323982, 1.347939615, 1.339152267 ], "streamfusion_trials_seconds": [ 1.071662532, 1.117585022, 1.034377405, 1.054914281, 1.032706895 ], "stock_median_seconds": 1.347939615, "streamfusion_median_seconds": 1.054914281, "stock_range_seconds": [ 1.339152267, 1.357323982 ], "streamfusion_range_seconds": [ 1.032706895, 1.117585022 ], "raw_trial_lines": [ "[table-function-trial] shape=split engine=Flink trial=0 warmup=true rows=2000000 keys=65536 width=16 seconds=2.868481", "[table-function-trial] shape=split engine=StreamFusion trial=0 warmup=true rows=2000000 keys=65536 width=16 seconds=1.340238", "[table-function-trial] shape=split engine=StreamFusion trial=1 warmup=true rows=2000000 keys=65536 width=16 seconds=1.155190", "[table-function-trial] shape=split engine=Flink trial=1 warmup=true rows=2000000 keys=65536 width=16 seconds=1.351136", "[table-function-trial] shape=split engine=Flink trial=2 warmup=false rows=2000000 keys=65536 width=16 seconds=1.357145", "[table-function-trial] shape=split engine=StreamFusion trial=2 warmup=false rows=2000000 keys=65536 width=16 seconds=1.071663", "[table-function-trial] shape=split engine=StreamFusion trial=3 warmup=false rows=2000000 keys=65536 width=16 seconds=1.117585", "[table-function-trial] shape=split engine=Flink trial=3 warmup=false rows=2000000 keys=65536 width=16 seconds=1.346728", "[table-function-trial] shape=split engine=Flink trial=4 warmup=false rows=2000000 keys=65536 width=16 seconds=1.357324", "[table-function-trial] shape=split engine=StreamFusion trial=4 warmup=false rows=2000000 keys=65536 width=16 seconds=1.034377", "[table-function-trial] shape=split engine=StreamFusion trial=5 warmup=false rows=2000000 keys=65536 width=16 seconds=1.054914", "[table-function-trial] shape=split engine=Flink trial=5 warmup=false rows=2000000 keys=65536 width=16 seconds=1.347940", "[table-function-trial] shape=split engine=Flink trial=6 warmup=false rows=2000000 keys=65536 width=16 seconds=1.339152", "[table-function-trial] shape=split engine=StreamFusion trial=6 warmup=false rows=2000000 keys=65536 width=16 seconds=1.032707", "[table-function] shape=split rows=2000000 keys=65536 width=16 stock=1.347940 native=1.054914 stock_trials=[1.357145337, 1.346728171, 1.357323982, 1.347939615, 1.339152267] native_trials=[1.071662532, 1.117585022, 1.034377405, 1.054914281, 1.032706895]" ], "status": "completed; consumed-row assertions pass for native candidates; actual preceding revision asserts zero substitutions" }, "unfused-split": { "stock_trials_seconds": [ 1.434605116, 1.388926574, 1.435085811, 1.373580974, 1.42212144 ], "streamfusion_trials_seconds": [ 1.413372304, 1.331916395, 1.319477485, 1.335664793, 1.329508413 ], "stock_median_seconds": 1.42212144, "streamfusion_median_seconds": 1.331916395, "stock_range_seconds": [ 1.373580974, 1.435085811 ], "streamfusion_range_seconds": [ 1.319477485, 1.413372304 ], "raw_trial_lines": [ "[table-function-trial] shape=split engine=Flink trial=0 warmup=true rows=2000000 keys=65536 width=16 seconds=2.864546", "[table-function-trial] shape=split engine=StreamFusion trial=0 warmup=true rows=2000000 keys=65536 width=16 seconds=1.747620", "[table-function-trial] shape=split engine=StreamFusion trial=1 warmup=true rows=2000000 keys=65536 width=16 seconds=1.434112", "[table-function-trial] shape=split engine=Flink trial=1 warmup=true rows=2000000 keys=65536 width=16 seconds=1.384619", "[table-function-trial] shape=split engine=Flink trial=2 warmup=false rows=2000000 keys=65536 width=16 seconds=1.434605", "[table-function-trial] shape=split engine=StreamFusion trial=2 warmup=false rows=2000000 keys=65536 width=16 seconds=1.413372", "[table-function-trial] shape=split engine=StreamFusion trial=3 warmup=false rows=2000000 keys=65536 width=16 seconds=1.331916", "[table-function-trial] shape=split engine=Flink trial=3 warmup=false rows=2000000 keys=65536 width=16 seconds=1.388927", "[table-function-trial] shape=split engine=Flink trial=4 warmup=false rows=2000000 keys=65536 width=16 seconds=1.435086", "[table-function-trial] shape=split engine=StreamFusion trial=4 warmup=false rows=2000000 keys=65536 width=16 seconds=1.319477", "[table-function-trial] shape=split engine=StreamFusion trial=5 warmup=false rows=2000000 keys=65536 width=16 seconds=1.335665", "[table-function-trial] shape=split engine=Flink trial=5 warmup=false rows=2000000 keys=65536 width=16 seconds=1.373581", "[table-function-trial] shape=split engine=Flink trial=6 warmup=false rows=2000000 keys=65536 width=16 seconds=1.422121", "[table-function-trial] shape=split engine=StreamFusion trial=6 warmup=false rows=2000000 keys=65536 width=16 seconds=1.329508", "[table-function] shape=split rows=2000000 keys=65536 width=16 stock=1.422121 native=1.331916 stock_trials=[1.434605116, 1.388926574, 1.435085811, 1.373580974, 1.42212144] native_trials=[1.413372304, 1.331916395, 1.319477485, 1.335664793, 1.329508413]" ], "status": "completed; consumed-row assertions pass for native candidates; actual preceding revision asserts zero substitutions" }, "pruned-group": { "stock_trials_seconds": [ 4.371194327, 4.273796797, 4.408781678, 4.643322855, 5.108468781 ], "streamfusion_trials_seconds": [ 1.068270263, 0.996225228, 1.012321708, 1.168143282, 0.996130982 ], "stock_median_seconds": 4.408781678, "streamfusion_median_seconds": 1.012321708, "stock_range_seconds": [ 4.273796797, 5.108468781 ], "streamfusion_range_seconds": [ 0.996130982, 1.168143282 ], "raw_trial_lines": [ "[table-function-trial] shape=group engine=Flink trial=0 warmup=true rows=500000 keys=16384 width=16 seconds=6.368908", "[table-function-trial] shape=group engine=StreamFusion trial=0 warmup=true rows=500000 keys=16384 width=16 seconds=1.393235", "[table-function-trial] shape=group engine=StreamFusion trial=1 warmup=true rows=500000 keys=16384 width=16 seconds=1.157425", "[table-function-trial] shape=group engine=Flink trial=1 warmup=true rows=500000 keys=16384 width=16 seconds=4.672349", "[table-function-trial] shape=group engine=Flink trial=2 warmup=false rows=500000 keys=16384 width=16 seconds=4.371194", "[table-function-trial] shape=group engine=StreamFusion trial=2 warmup=false rows=500000 keys=16384 width=16 seconds=1.068270", "[table-function-trial] shape=group engine=StreamFusion trial=3 warmup=false rows=500000 keys=16384 width=16 seconds=0.996225", "[table-function-trial] shape=group engine=Flink trial=3 warmup=false rows=500000 keys=16384 width=16 seconds=4.273797", "[table-function-trial] shape=group engine=Flink trial=4 warmup=false rows=500000 keys=16384 width=16 seconds=4.408782", "[table-function-trial] shape=group engine=StreamFusion trial=4 warmup=false rows=500000 keys=16384 width=16 seconds=1.012322", "[table-function-trial] shape=group engine=StreamFusion trial=5 warmup=false rows=500000 keys=16384 width=16 seconds=1.168143", "[table-function-trial] shape=group engine=Flink trial=5 warmup=false rows=500000 keys=16384 width=16 seconds=4.643323", "[table-function-trial] shape=group engine=Flink trial=6 warmup=false rows=500000 keys=16384 width=16 seconds=5.108469", "[table-function-trial] shape=group engine=StreamFusion trial=6 warmup=false rows=500000 keys=16384 width=16 seconds=0.996131", "[table-function] shape=group rows=500000 keys=16384 width=16 stock=4.408782 native=1.012322 stock_trials=[4.371194327, 4.273796797, 4.408781678, 4.643322855, 5.108468781] native_trials=[1.068270263, 0.996225228, 1.012321708, 1.168143282, 0.996130982]" ], "status": "completed; consumed-row assertions pass for native candidates; actual preceding revision asserts zero substitutions" }, "unfused-group": { "stock_trials_seconds": [ 4.596055727, 4.534434215, 4.78824132, 4.585207533, 4.593666146 ], "streamfusion_trials_seconds": [ 1.039488493, 1.008913309, 1.037515459, 1.008681854, 1.019089194 ], "stock_median_seconds": 4.593666146, "streamfusion_median_seconds": 1.019089194, "stock_range_seconds": [ 4.534434215, 4.78824132 ], "streamfusion_range_seconds": [ 1.008681854, 1.039488493 ], "raw_trial_lines": [ "[table-function-trial] shape=group engine=Flink trial=0 warmup=true rows=500000 keys=16384 width=16 seconds=6.680746", "[table-function-trial] shape=group engine=StreamFusion trial=0 warmup=true rows=500000 keys=16384 width=16 seconds=1.434095", "[table-function-trial] shape=group engine=StreamFusion trial=1 warmup=true rows=500000 keys=16384 width=16 seconds=1.181657", "[table-function-trial] shape=group engine=Flink trial=1 warmup=true rows=500000 keys=16384 width=16 seconds=4.597888", "[table-function-trial] shape=group engine=Flink trial=2 warmup=false rows=500000 keys=16384 width=16 seconds=4.596056", "[table-function-trial] shape=group engine=StreamFusion trial=2 warmup=false rows=500000 keys=16384 width=16 seconds=1.039488", "[table-function-trial] shape=group engine=StreamFusion trial=3 warmup=false rows=500000 keys=16384 width=16 seconds=1.008913", "[table-function-trial] shape=group engine=Flink trial=3 warmup=false rows=500000 keys=16384 width=16 seconds=4.534434", "[table-function-trial] shape=group engine=Flink trial=4 warmup=false rows=500000 keys=16384 width=16 seconds=4.788241", "[table-function-trial] shape=group engine=StreamFusion trial=4 warmup=false rows=500000 keys=16384 width=16 seconds=1.037515", "[table-function-trial] shape=group engine=StreamFusion trial=5 warmup=false rows=500000 keys=16384 width=16 seconds=1.008682", "[table-function-trial] shape=group engine=Flink trial=5 warmup=false rows=500000 keys=16384 width=16 seconds=4.585208", "[table-function-trial] shape=group engine=Flink trial=6 warmup=false rows=500000 keys=16384 width=16 seconds=4.593666", "[table-function-trial] shape=group engine=StreamFusion trial=6 warmup=false rows=500000 keys=16384 width=16 seconds=1.019089", "[table-function] shape=group rows=500000 keys=16384 width=16 stock=4.593666 native=1.019089 stock_trials=[4.596055727, 4.534434215, 4.78824132, 4.585207533, 4.593666146] native_trials=[1.039488493, 1.008913309, 1.037515459, 1.008681854, 1.019089194]" ], "status": "completed; consumed-row assertions pass for native candidates; actual preceding revision asserts zero substitutions" }, "previous-split": { "stock_trials_seconds": [ 1.401942998, 1.45299888, 1.427113539, 1.386735826, 1.4041156 ], "streamfusion_trials_seconds": [ 1.46317041, 1.465185698, 1.390118702, 1.386282789, 1.39278385 ], "stock_median_seconds": 1.4041156, "streamfusion_median_seconds": 1.39278385, "stock_range_seconds": [ 1.386735826, 1.45299888 ], "streamfusion_range_seconds": [ 1.386282789, 1.465185698 ], "raw_trial_lines": [ "[table-function-trial] shape=split engine=Flink trial=0 warmup=true rows=2000000 keys=65536 width=16 seconds=2.927856", "[table-function-trial] shape=split engine=StreamFusion trial=0 warmup=true rows=2000000 keys=65536 width=16 seconds=1.447805", "[table-function-trial] shape=split engine=StreamFusion trial=1 warmup=true rows=2000000 keys=65536 width=16 seconds=1.483276", "[table-function-trial] shape=split engine=Flink trial=1 warmup=true rows=2000000 keys=65536 width=16 seconds=1.404084", "[table-function-trial] shape=split engine=Flink trial=2 warmup=false rows=2000000 keys=65536 width=16 seconds=1.401943", "[table-function-trial] shape=split engine=StreamFusion trial=2 warmup=false rows=2000000 keys=65536 width=16 seconds=1.463170", "[table-function-trial] shape=split engine=StreamFusion trial=3 warmup=false rows=2000000 keys=65536 width=16 seconds=1.465186", "[table-function-trial] shape=split engine=Flink trial=3 warmup=false rows=2000000 keys=65536 width=16 seconds=1.452999", "[table-function-trial] shape=split engine=Flink trial=4 warmup=false rows=2000000 keys=65536 width=16 seconds=1.427114", "[table-function-trial] shape=split engine=StreamFusion trial=4 warmup=false rows=2000000 keys=65536 width=16 seconds=1.390119", "[table-function-trial] shape=split engine=StreamFusion trial=5 warmup=false rows=2000000 keys=65536 width=16 seconds=1.386283", "[table-function-trial] shape=split engine=Flink trial=5 warmup=false rows=2000000 keys=65536 width=16 seconds=1.386736", "[table-function-trial] shape=split engine=Flink trial=6 warmup=false rows=2000000 keys=65536 width=16 seconds=1.404116", "[table-function-trial] shape=split engine=StreamFusion trial=6 warmup=false rows=2000000 keys=65536 width=16 seconds=1.392784", "[table-function] shape=split rows=2000000 keys=65536 width=16 stock=1.404116 native=1.392784 stock_trials=[1.401942998, 1.45299888, 1.427113539, 1.386735826, 1.4041156] native_trials=[1.46317041, 1.465185698, 1.390118702, 1.386282789, 1.39278385]" ], "status": "completed; consumed-row assertions pass for native candidates; actual preceding revision asserts zero substitutions" }, "previous-group": { "stock_trials_seconds": [ 4.285691959, 4.558510717, 4.197473738, 4.188013293, 4.309926482 ], "streamfusion_trials_seconds": [ 4.282567086, 4.454520869, 4.300031647, 4.324396827, 4.781681565 ], "stock_median_seconds": 4.285691959, "streamfusion_median_seconds": 4.324396827, "stock_range_seconds": [ 4.188013293, 4.558510717 ], "streamfusion_range_seconds": [ 4.282567086, 4.781681565 ], "raw_trial_lines": [ "[table-function-trial] shape=group engine=Flink trial=0 warmup=true rows=500000 keys=16384 width=16 seconds=6.457015", "[table-function-trial] shape=group engine=StreamFusion trial=0 warmup=true rows=500000 keys=16384 width=16 seconds=4.851949", "[table-function-trial] shape=group engine=StreamFusion trial=1 warmup=true rows=500000 keys=16384 width=16 seconds=4.760861", "[table-function-trial] shape=group engine=Flink trial=1 warmup=true rows=500000 keys=16384 width=16 seconds=4.330045", "[table-function-trial] shape=group engine=Flink trial=2 warmup=false rows=500000 keys=16384 width=16 seconds=4.285692", "[table-function-trial] shape=group engine=StreamFusion trial=2 warmup=false rows=500000 keys=16384 width=16 seconds=4.282567", "[table-function-trial] shape=group engine=StreamFusion trial=3 warmup=false rows=500000 keys=16384 width=16 seconds=4.454521", "[table-function-trial] shape=group engine=Flink trial=3 warmup=false rows=500000 keys=16384 width=16 seconds=4.558511", "[table-function-trial] shape=group engine=Flink trial=4 warmup=false rows=500000 keys=16384 width=16 seconds=4.197474", "[table-function-trial] shape=group engine=StreamFusion trial=4 warmup=false rows=500000 keys=16384 width=16 seconds=4.300032", "[table-function-trial] shape=group engine=StreamFusion trial=5 warmup=false rows=500000 keys=16384 width=16 seconds=4.324397", "[table-function-trial] shape=group engine=Flink trial=5 warmup=false rows=500000 keys=16384 width=16 seconds=4.188013", "[table-function-trial] shape=group engine=Flink trial=6 warmup=false rows=500000 keys=16384 width=16 seconds=4.309926", "[table-function-trial] shape=group engine=StreamFusion trial=6 warmup=false rows=500000 keys=16384 width=16 seconds=4.781682", "[table-function] shape=group rows=500000 keys=16384 width=16 stock=4.285692 native=4.324397 stock_trials=[4.285691959, 4.558510717, 4.197473738, 4.188013293, 4.309926482] native_trials=[4.282567086, 4.454520869, 4.300031647, 4.324396827, 4.781681565]" ], "status": "completed; consumed-row assertions pass for native candidates; actual preceding revision asserts zero substitutions" } }, "profiles": { "cpu": { "artifact": "jvm-table-functions-cpu-2026-10-15.collapsed.gz", "sha256": "24e581e9ebb52b7f7126b4e81c5c8d340956a3818c886178f57cfb3188f72284", "thread_group_weights": { "native_producer": 2112, "native_aggregate": 2338, "stock_producer": 3285, "stock_aggregate": 10655 }, "weight_unit": "CPU samples" }, "alloc": { "artifact": "jvm-table-functions-alloc-2026-10-15.collapsed.gz", "sha256": "95b1b9220af76c982bf16a81a822526ab4ed22f74cd8b480dafd60ca909275e1", "thread_group_weights": { "native_producer": 11150557184, "stock_producer": 19004391424, "native_aggregate": 7503609856, "stock_aggregate": 31307333632 }, "weight_unit": "sampled Java allocation bytes" } }, "profile_configuration": "Initial unfused prototype, 500k source rows per case, two warmups/three pairs, software cpu-clock2ms, DWARF native stacks, threads and Java alloc1m. Both split and grouped-JSON cases completed with positive native-consumption checks. Profiled timings excluded from acceleration claims.", "profile_findings": "Redundant NativeCalc projection/JNI boundary and writes of discarded correlate columns are visible on producer stacks. Rust group update, JSON serialization, allocations/copies and state-output work appear on grouped native stacks. Inclusive frames overlap; native allocation calls do not provide allocation-byte totals. Raw Java allocation profiles do not measure Rust allocated bytes or peak heap.", "decision": "Admit verified basic synchronous JVM table functions by default after stock/actual-previous release comparisons on both Flink lines, including wide STRING and numeric types. Preserve explicit fallback for other/specialized signatures. JVM aggregate/OVER and nested scalar support remain open under #237.", "comparisons": { "split_native_vs_stock": 1.2777717007700646, "split_native_vs_previous": 1.320281538590717, "group_native_vs_stock": 4.355119171266454, "group_native_vs_previous": 4.271761430013709 }, "limits": [ "Stock medians drift between separate JVMs; do not attribute the entire unfused/pruned difference to one change.", "The unfused control uses the same compiled producer with an identity projected view; it is a layout control, not the preceding released implementation.", "The grouped win includes existing native JSON aggregation; standalone and grouped boundaries are reported separately.", "Other types, specialized functions and other JVM function kinds remain outside admission; benchmarks do not establish all-function acceleration." ], "initial_retained_metrics_diagnostics": { "status": "Superseded fixture; retained as diagnostic only, excluded from current speed claims. All finished trial lines retained, including the interrupted previous-group run.", "problem": "Actual preceding-revision group run reached 99.99% old-generation occupancy and more than600 full GCs. It was interrupted with SIGTERM after a thread/GC diagnostic. Retained completed-job metric references were suspected; closing the metrics cluster after each pair allowed all identical-size comparisons to complete.", "gc_observations": [ " S0 S1 E O M CCS YGC YGCT FGC FGCT CGC CGCT GCT ", " 0.00 0.00 0.00 99.99 98.63 96.21 1403 4.477 612 176.859 41 0.087 181.424", " 0.00 0.00 0.00 99.99 98.63 96.21 1407 4.485 616 178.042 41 0.087 182.614" ], "trial_lines": { "previous-group": [ "[table-function-trial] shape=group engine=Flink trial=0 warmup=true rows=500000 keys=16384 width=16 seconds=6.485894", "[table-function-trial] shape=group engine=StreamFusion trial=0 warmup=true rows=500000 keys=16384 width=16 seconds=4.633476", "[table-function-trial] shape=group engine=StreamFusion trial=1 warmup=true rows=500000 keys=16384 width=16 seconds=4.318592", "[table-function-trial] shape=group engine=Flink trial=1 warmup=true rows=500000 keys=16384 width=16 seconds=4.230614", "[table-function-trial] shape=group engine=Flink trial=2 warmup=false rows=500000 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warmup=false rows=2000000 keys=65536 width=16 seconds=1.346813", "[table-function-trial] shape=split engine=StreamFusion trial=2 warmup=false rows=2000000 keys=65536 width=16 seconds=1.431983", "[table-function-trial] shape=split engine=StreamFusion trial=3 warmup=false rows=2000000 keys=65536 width=16 seconds=1.427766", "[table-function-trial] shape=split engine=Flink trial=3 warmup=false rows=2000000 keys=65536 width=16 seconds=1.388201", "[table-function-trial] shape=split engine=Flink trial=4 warmup=false rows=2000000 keys=65536 width=16 seconds=1.353802", "[table-function-trial] shape=split engine=StreamFusion trial=4 warmup=false rows=2000000 keys=65536 width=16 seconds=1.341420", "[table-function-trial] shape=split engine=StreamFusion trial=5 warmup=false rows=2000000 keys=65536 width=16 seconds=1.324147", "[table-function-trial] shape=split engine=Flink trial=5 warmup=false rows=2000000 keys=65536 width=16 seconds=1.366874", "[table-function-trial] shape=split engine=Flink 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object reuse off/on", "8193 output rows from one invocation", "all four RowKinds with LEFT padding", "open/evaluation/close failure parity", "memory/native RocksDB with append/retracting input, two forced checkpoint restores per scenario", "positive native table-function and downstream aggregate consumption plus released native memory", "nested ARRAY-returning function remains fallback", "INT/BIGINT arguments/results and grouped consumers", "parallelism3 with keyed aggregates before and after fanout; final changelog parity", "operator-specific disable switch retains complete-query fallback with zero native substitutions" ], "status": "66 selected checks ran jointly per release (three existing1.18 UNNEST skips), then the additional disable-switch test passed separately on each release. 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preceding code." }, "118-group-previous": { "stock_trials_seconds": [ 4.277507684, 4.320652843, 4.252823644, 4.258758171, 4.476729095 ], "streamfusion_trials_seconds": [ 4.262938429, 4.551330357, 4.559330007, 4.261864701, 4.210828287 ], "stock_median_seconds": 4.277507684, "streamfusion_median_seconds": 4.262938429, "stock_range_seconds": [ 4.252823644, 4.476729095 ], "streamfusion_range_seconds": [ 4.210828287, 4.559330007 ], "raw_trial_lines": [ "[table-function-trial] shape=group engine=Flink trial=0 warmup=true rows=500000 keys=16384 width=16 seconds=6.372404", "[table-function-trial] shape=group engine=StreamFusion trial=0 warmup=true rows=500000 keys=16384 width=16 seconds=4.819440", "[table-function-trial] shape=group engine=StreamFusion trial=1 warmup=true rows=500000 keys=16384 width=16 seconds=4.423188", "[table-function-trial] shape=group engine=Flink trial=1 warmup=true rows=500000 keys=16384 width=16 seconds=4.339941", "[table-function-trial] shape=group engine=Flink 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trial=6 warmup=false rows=500000 keys=16384 width=16 seconds=4.476729", "[table-function-trial] shape=group engine=StreamFusion trial=6 warmup=false rows=500000 keys=16384 width=16 seconds=4.210828", "[table-function] shape=group rows=500000 keys=16384 width=16 stock=4.277508 native=4.262938 stock_trials=[4.277507684, 4.320652843, 4.252823644, 4.258758171, 4.476729095] native_trials=[4.262938429, 4.551330357, 4.559330007, 4.261864701, 4.210828287]" ], "status": "Completed with native-consumption assertions for candidates or zero-substitution assertions on actual preceding code." } }, "configuration": "Same released JDK17/release+mimalloc/per-pair-cleanup timing boundary, p1,2GiB,1024row transposes,IPC,two warmups/five alternating pairs. Wide and numeric cases use2Mrows/65536keys. Previous group1.18 uses500k/16384keys.", "wide": "128 characters per token, including \u00e9. Same two-token split and every-eighth NULL text.", "numeric": "INT key and BIGINT value inputs; two emitted ROW values per non-NULL input, every eighth value NULL. Numeric source has no STRING payload; width property printed by shared logger is unused.", "numeric_query": "SELECT s.k,t.n,t.pos FROM src s,LATERAL TABLE(numeric_rows(s.k,s.n)) AS t(n,pos)", "previous_revisions": { "2.2": "b965b8bf0c97450f6971f20db0fe6abc6bbac8ae", "1.18": "b965b8bf0c97450f6971f20db0fe6abc6bbac8ae" }, "decision": "All candidate ranges lie below paired stock ranges and below actual preceding-revision ranges. Admit verified VARCHAR/INT/BIGINT table functions by default; unsupported/specialized signatures retain fallback. Separate-JVM controls drift; report whole-job improvements without isolated-cost attribution." }, "admitted_path_profiles": { "configuration": "Default-admitted production path, Flink2.2.1/JDK17, 500krows/16384keys, numeric and 128-character grouped split cases. Two warmups/three pairs per case, fresh cluster per pair, release+mimalloc/2GiB/IPC/both transposes. cpu-clock2ms/DWARF native stacks/Javaalloc1m. Profiled durations excluded from acceleration claims.", "profiles": { "cpu": { "artifact": "jvm-table-functions-admitted-cpu-2026-10-15.collapsed.gz", "sha256": "0eb2a2e55d43cc21ba2ec2a26c523cf788714924857ff20458cd4c414448469f", "thread_group_weights": { "native_aggregate": 6295, "stock_producer": 4170, "native_producer": 2745, "stock_aggregate": 17044 }, "symbolized_rust_inclusive_weight": 4169, "weight_unit": "CPU samples" }, "alloc": { "artifact": "jvm-table-functions-admitted-alloc-2026-10-15.collapsed.gz", "sha256": "3a8588f12eaa6f8be86c268862c98910a4bef43db9d3d571926968c4dbf3c91e", "thread_group_weights": { "stock_producer": 19726860288, "native_producer": 12995002368, "native_aggregate": 32101105664, "stock_aggregate": 71598866432 }, "symbolized_rust_inclusive_weight": 0, "weight_unit": "sampled Java allocation bytes" } }, "raw_profiled_trial_lines": [ "[table-function-trial] shape=numeric engine=Flink trial=0 warmup=true rows=500000 keys=16384 width=128 seconds=1.814847", "[table-function-trial] shape=numeric engine=StreamFusion trial=0 warmup=true rows=500000 keys=16384 width=128 seconds=0.522413", "[table-function-trial] shape=numeric engine=StreamFusion trial=1 warmup=true rows=500000 keys=16384 width=128 seconds=0.388726", "[table-function-trial] shape=numeric engine=Flink trial=1 warmup=true rows=500000 keys=16384 width=128 seconds=0.316069", "[table-function-trial] shape=numeric engine=Flink trial=2 warmup=false rows=500000 keys=16384 width=128 seconds=0.329767", "[table-function-trial] shape=numeric engine=StreamFusion trial=2 warmup=false rows=500000 keys=16384 width=128 seconds=0.310206", "[table-function-trial] shape=numeric engine=StreamFusion trial=3 warmup=false rows=500000 keys=16384 width=128 seconds=0.255043", "[table-function-trial] shape=numeric engine=Flink trial=3 warmup=false rows=500000 keys=16384 width=128 seconds=0.276188", "[table-function-trial] shape=numeric engine=Flink trial=4 warmup=false rows=500000 keys=16384 width=128 seconds=0.290168", "[table-function-trial] shape=numeric engine=StreamFusion trial=4 warmup=false rows=500000 keys=16384 width=128 seconds=0.256127", "[table-function] shape=numeric rows=500000 keys=16384 width=128 stock=0.290168 native=0.256127 stock_trials=[0.329767296, 0.276187596, 0.290168078] native_trials=[0.310206321, 0.255042929, 0.25612673]", "[table-function-trial] shape=group engine=Flink trial=0 warmup=true rows=500000 keys=16384 width=128 seconds=7.975503", "[table-function-trial] shape=group engine=StreamFusion trial=0 warmup=true rows=500000 keys=16384 width=128 seconds=3.645540", "[table-function-trial] shape=group engine=StreamFusion trial=1 warmup=true rows=500000 keys=16384 width=128 seconds=3.253311", "[table-function-trial] shape=group engine=Flink trial=1 warmup=true rows=500000 keys=16384 width=128 seconds=7.571973", "[table-function-trial] shape=group engine=Flink trial=2 warmup=false rows=500000 keys=16384 width=128 seconds=7.580753", "[table-function-trial] shape=group engine=StreamFusion trial=2 warmup=false rows=500000 keys=16384 width=128 seconds=3.395803", "[table-function-trial] shape=group engine=StreamFusion trial=3 warmup=false rows=500000 keys=16384 width=128 seconds=3.423328", "[table-function-trial] shape=group engine=Flink trial=3 warmup=false rows=500000 keys=16384 width=128 seconds=7.409579", "[table-function-trial] shape=group engine=Flink trial=4 warmup=false rows=500000 keys=16384 width=128 seconds=7.207962", "[table-function-trial] shape=group engine=StreamFusion trial=4 warmup=false rows=500000 keys=16384 width=128 seconds=3.304634", "[table-function] shape=group rows=500000 keys=16384 width=128 stock=7.409579 native=3.395803 stock_trials=[7.580753204, 7.409578964, 7.207962233] native_trials=[3.39580346, 3.423327908, 3.304634066]" ], "interpretation": "Numeric producer has no separate projection/JNI operator. The grouped producer still computes JSON_STRING before unchanged native grouping, so a NativeCalc remains for that expression. Symbolized Rust group update/JSON output/allocation paths remain in the mixed profile. Java allocation weights are neither Rust allocation totals nor peak heap." } }