{ "environment": { "line": "2.2", "cpu": "12th Gen Intel(R) Core(TM) i7-12650H", "platform": "Linux-6.18.54.1-microsoft-standard-WSL2-x86_64-with-glibc2.35", "java": "openjdk version \"17.0.20.1\" 2026-08-18\nOpenJDK Runtime Environment (build 17.0.20.1+1-1-22.04-Ubuntu)\nOpenJDK 64-Bit Server VM (build 17.0.20.1+1-1-22.04-Ubuntu, mixed mode, sharing)\n", "baseline_java": "d951a83808425f9e7df7c0f6fc3fdb082443885f", "candidate_java": "8a490951 plus generic string exit from f7867f55", "shared_native": "Integrated 717b8d94 release core; affected string/literal kernels unchanged. Same DSO for both Java cohorts, hash retained per record.", "rows": 2000000, "warmup": 2, "runs": 5, "heap": "2 GiB", "parallelism": 1, "method": "Sequential fresh JVMs by cohort/case, alternating stock/native pairs. No detected competing builds/tests; continuous CPU/process/memory/I/O observations retained. Same source/transposes/JNI/row-sink timing boundary as primary." }, "records": [ { "cohort": "previous", "case": "join", "expression": "ARRAY_JOIN(arr,'|','?')", "map_source": false, "type": "STRING", "width": 8, "stock_trials": [ 1.94797838, 1.955917123, 1.964386683, 1.971837623, 1.973798994 ], "native_trials": [ 1.805405612, 1.775724584, 1.798114982, 1.780068409, 1.789415532 ], "route_evidence": [ "[collection-engine] [NativeCalc functions: native=[ARRAY_JOIN], jvm=[]]", "[collection-route] [{recordsOut=2000000, subtask=0, attempt=0, jobId=a762ace9f358f74933d5b42c4fc72160, recordsIn=2000000, operator=NativeCalc(select=[ARRAY_JOIN(arr, '|', '?') AS v, true AS anchor], nativeFuncti}]", "[collection-route] [{recordsOut=2000000, subtask=0, attempt=0, jobId=b65ae2d5d47873ffd0be62668a908692, recordsIn=2000000, operator=NativeCalc(select=[ARRAY_JOIN(arr, '|', '?') AS v, true AS anchor], nativeFuncti}]", "[collection-route] [{recordsOut=2000000, subtask=0, attempt=0, jobId=81f64131c24bb454150498730b9ad41a, recordsIn=2000000, operator=NativeCalc(select=[ARRAY_JOIN(arr, '|', '?') AS v, true AS anchor], nativeFuncti}]", "[collection-route] [{recordsOut=2000000, subtask=0, attempt=0, jobId=2beae6803e8b3de152c79a0ee1ee7989, recordsIn=2000000, operator=NativeCalc(select=[ARRAY_JOIN(arr, '|', '?') AS v, true AS anchor], nativeFuncti}]", "[collection-route] [{recordsOut=2000000, subtask=0, attempt=0, jobId=1925d4ca24264e4c5d9deb111094c977, recordsIn=2000000, operator=NativeCalc(select=[ARRAY_JOIN(arr, '|', '?') AS v, true AS anchor], nativeFuncti}]", "[collection-route] [{recordsOut=2000000, subtask=0, attempt=0, jobId=ab031823eef28ce8839fdb9cb0b1d4d1, recordsIn=2000000, operator=NativeCalc(select=[ARRAY_JOIN(arr, '|', '?') AS v, true AS anchor], nativeFuncti}]", "[collection-route] [{recordsOut=2000000, subtask=0, attempt=0, jobId=d96b147d991a2d282d993f9c364a1476, recordsIn=2000000, operator=NativeCalc(select=[ARRAY_JOIN(arr, '|', '?') AS v, true AS anchor], nativeFuncti}]" ], "all_trials": [ "[collection-trial] engine=flink trial=0 warmup=true rows=2000000 seconds=2.822545306", "[collection-trial] engine=native trial=0 warmup=true rows=2000000 seconds=1.996300702", "[collection-trial] engine=native trial=1 warmup=true rows=2000000 seconds=1.810851167", "[collection-trial] engine=flink trial=1 warmup=true rows=2000000 seconds=1.990689404", "[collection-trial] engine=flink trial=2 warmup=false rows=2000000 seconds=1.947978380", "[collection-trial] engine=native trial=2 warmup=false rows=2000000 seconds=1.805405612", "[collection-trial] engine=native trial=3 warmup=false rows=2000000 seconds=1.775724584", "[collection-trial] engine=flink trial=3 warmup=false rows=2000000 seconds=1.955917123", "[collection-trial] engine=flink trial=4 warmup=false rows=2000000 seconds=1.964386683", "[collection-trial] engine=native trial=4 warmup=false rows=2000000 seconds=1.798114982", "[collection-trial] engine=native trial=5 warmup=false rows=2000000 seconds=1.780068409", "[collection-trial] engine=flink trial=5 warmup=false rows=2000000 seconds=1.971837623", "[collection-trial] engine=flink trial=6 warmup=false rows=2000000 seconds=1.973798994", "[collection-trial] engine=native trial=6 warmup=false rows=2000000 seconds=1.789415532" ], "validation": { "cohort": "baseline", "case": "join", "expression": "ARRAY_JOIN(arr,'|','?')", "rows": 2000000, "width": 8, "type": "STRING", "map": false, "warmup": 2, "runs": 5, "command": [ "mvn", "-o", "-q", "-Pbench", "-pl", "streamfusion-runtime", "surefire:test@default-test", "-Dtest=DynamicCollectionBenchmark", "-Dcollection.expression=ARRAY_JOIN(arr,'|','?')", "-Dcollection.map=false", "-Dcollection.type=STRING", "-Dcollection.width=8", "-Dcollection.rows=2000000", "-Dcollection.warmup=2", "-Dcollection.runs=5", "-Dcollection.bytes=64", "-Dcollection.rustFunction=ARRAY_JOIN", "-Dsf.extraJvmArgs=-Xmx2g" ], "exitCode": 0, "elapsed": 34.58824372291565, "profiled": false, "contaminated": false, "classesSha256": "8458ac9f017cc55872facc4bccc2ee2fb2ce7dbab04235879cb000c31e661e1d", "dsoSha256": "b574f02abc8a286c1f295b6cc1660f9764ce4d77fa5d88c940e1347f0755856f", "stockMedian": 1.964387, "nativeMedian": 1.789416, "stockTrials": [ 1.94797838, 1.955917123, 1.964386683, 1.971837623, 1.973798994 ], "nativeTrials": [ 1.805405612, 1.775724584, 1.798114982, 1.780068409, 1.789415532 ] }, "host_observations": [ { "time": 1792682069.2816012, "cpuCores": 0.0, "processes": [], "jobs": [], "memoryKiB": { "MemAvailable": 9139888, "SwapFree": 2668908 }, "ioFullAvg10": 0.0, "reasons": [] }, { "time": 1792682070.2832575, "cpuCores": 0.0, "processes": [], "jobs": [], "memoryKiB": { "MemAvailable": 9000016, "SwapFree": 2668908 }, "ioFullAvg10": 0.0, "reasons": [] }, { "time": 1792682071.2844236, "cpuCores": 0.0, "processes": [], "jobs": [], "memoryKiB": { "MemAvailable": 8751872, "SwapFree": 2668908 }, "ioFullAvg10": 0.0, "reasons": [] }, { "time": 1792682072.2855918, 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[], "memoryKiB": { "MemAvailable": 6961672, "SwapFree": 2668968 }, "ioFullAvg10": 0.0, "reasons": [] }, { "time": 1792682101.3226397, "cpuCores": 0.0, "processes": [], "jobs": [], "memoryKiB": { "MemAvailable": 6963276, "SwapFree": 2668968 }, "ioFullAvg10": 0.0, "reasons": [] }, { "time": 1792682102.323859, "cpuCores": 0.0, "processes": [], "jobs": [], "memoryKiB": { "MemAvailable": 6892752, "SwapFree": 2668968 }, "ioFullAvg10": 0.0, "reasons": [] }, { "time": 1792682103.3252072, "cpuCores": 0.0, "processes": [], "jobs": [], "memoryKiB": { "MemAvailable": 6894948, "SwapFree": 2668968 }, "ioFullAvg10": 0.0, "reasons": [] } ] }, { "cohort": "previous", "case": "typeof", "expression": "TYPEOF(idx)", "map_source": false, "type": "BIGINT", "width": 8, "stock_trials": [ 0.414840217, 0.402604054, 0.409308203, 0.407132178, 0.386647998 ], "native_trials": [ 0.395224161, 0.395868903, 0.361891083, 0.371549878, 0.374976868 ], "route_evidence": [ "[collection-engine] [NativeCalc functions: native=[TYPEOF], jvm=[]]", "[collection-route] [{subtask=0, attempt=0, jobId=bdff4377d18051bb45b48b251ee4fca7, recordsIn=2000000, operator=NativeCalc(select=[TYPEOF(idx) AS v, true AS anchor], nativeFunctions=[TYPEOF], , recordsOut=2000000}]", "[collection-route] [{subtask=0, attempt=0, jobId=336bfc39b1dfd11ea3beaaeadd3382b4, recordsIn=2000000, operator=NativeCalc(select=[TYPEOF(idx) AS v, true AS anchor], nativeFunctions=[TYPEOF], , recordsOut=2000000}]", "[collection-route] [{subtask=0, attempt=0, jobId=6c70727125b441801d1a724d15306de1, recordsIn=2000000, operator=NativeCalc(select=[TYPEOF(idx) AS v, true AS anchor], nativeFunctions=[TYPEOF], , recordsOut=2000000}]", "[collection-route] [{subtask=0, attempt=0, jobId=5be5e5e76a9440f0cacdfb98032db282, recordsIn=2000000, operator=NativeCalc(select=[TYPEOF(idx) AS v, true AS anchor], nativeFunctions=[TYPEOF], , recordsOut=2000000}]", "[collection-route] [{subtask=0, attempt=0, jobId=7bce51bc05dbb98071e54721e2df14dc, recordsIn=2000000, 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seconds=0.414840217", "[collection-trial] engine=native trial=2 warmup=false rows=2000000 seconds=0.395224161", "[collection-trial] engine=native trial=3 warmup=false rows=2000000 seconds=0.395868903", "[collection-trial] engine=flink trial=3 warmup=false rows=2000000 seconds=0.402604054", "[collection-trial] engine=flink trial=4 warmup=false rows=2000000 seconds=0.409308203", "[collection-trial] engine=native trial=4 warmup=false rows=2000000 seconds=0.361891083", "[collection-trial] engine=native trial=5 warmup=false rows=2000000 seconds=0.371549878", "[collection-trial] engine=flink trial=5 warmup=false rows=2000000 seconds=0.407132178", "[collection-trial] engine=flink trial=6 warmup=false rows=2000000 seconds=0.386647998", "[collection-trial] engine=native trial=6 warmup=false rows=2000000 seconds=0.374976868" ], "validation": { "cohort": "baseline", "case": "typeof", "expression": "TYPEOF(idx)", "rows": 2000000, "width": 8, "type": "BIGINT", "map": false, "warmup": 2, "runs": 5, 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"reasons": [] }, { "time": 1792682121.011103, "cpuCores": 0.0, "processes": [], "jobs": [], "memoryKiB": { "MemAvailable": 7583828, "SwapFree": 2669052 }, "ioFullAvg10": 0.0, "reasons": [] } ] }, { "cohort": "candidate", "case": "join", "expression": "ARRAY_JOIN(arr,'|','?')", "map_source": false, "type": "STRING", "width": 8, "stock_trials": [ 1.927445754, 1.952820426, 1.958906804, 1.972462974, 1.955763375 ], "native_trials": [ 1.712913522, 1.677607369, 1.672162245, 1.665595653, 1.663060627 ], "route_evidence": [ "[collection-engine] [NativeCalc functions: native=[ARRAY_JOIN], jvm=[]]", "[collection-route] [{operator=NativeCalc(select=[ARRAY_JOIN(arr, '|', '?') 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