{ "environment": { "line": "2.2", "baseline": "d951a83808425f9e7df7c0f6fc3fdb082443885f", "candidate": "fa4f40c024d6b0c7af4bfce6bb8847ca7c654d2d", "cpu": "AMD EPYC 9V74 80-Core Processor", "platform": "Linux-6.17.0-1022-azure-x86_64-with-glibc2.39", "java": "openjdk version \"17.0.20.1\" 2026-08-18\nOpenJDK Runtime Environment Temurin-17.0.20.1+1 (build 17.0.20.1+1)\nOpenJDK 64-Bit Server VM Temurin-17.0.20.1+1 (build 17.0.20.1+1, mixed mode, sharing)\n", "native_sha256": "3065d4328ac773790a75beac04e35aab49291abb1206b10250a09fbf5e7393a2", "native_features": "release, no-default-features, mimalloc", "heap": "2 GiB", "parallelism": 1, "warmup": 2, "runs": 5, "rows": 2000000, "method": "Fresh JVM per expression/cohort; alternating stock/native pairs; MiniCluster construction and explain outside timing; production sources, transposes, JNI, deployment and row sink inside." }, "records": [ { "cohort": "previous", "case": "map", "expression": "MAP[CAST(idx AS BIGINT),CAST(idx AS BIGINT)]", "map_source": false, "type": "BIGINT", "width": 8, "stock_trials": [ 0.990207436, 0.937343488, 0.910362044, 0.967528016, 0.93040155 ], "native_trials": [ 1.406646155, 1.37404128, 1.32624165, 1.303682351, 1.242782935 ], "route_evidence": [ "[collection-engine] [NativeCalc functions: native=[], jvm=[MAP, CAST], reason=MAP retains Flink's generated-expression key deduplication]", "[collection-route] [{jobId=29fc961877107ed7eaa4a19be672d208, attempt=0, subtask=0, recordsOut=2000000, operator=NativeCalc(select=[MAP(CAST(idx AS BIGINT), CAST(idx AS BIGINT)) AS v, true AS a, recordsIn=2000000}]", "[collection-route] [{jobId=699fffb659919474b8701fba92847803, attempt=0, subtask=0, recordsOut=2000000, operator=NativeCalc(select=[MAP(CAST(idx AS BIGINT), CAST(idx AS BIGINT)) AS v, true AS a, recordsIn=2000000}]", "[collection-route] [{jobId=57bc747bc735e1ee8145da8a26dc8769, attempt=0, subtask=0, recordsOut=2000000, operator=NativeCalc(select=[MAP(CAST(idx AS BIGINT), CAST(idx AS BIGINT)) AS v, true AS a, recordsIn=2000000}]", "[collection-route] [{jobId=5beff2652456731e162c7939afca1aa1, attempt=0, subtask=0, recordsOut=2000000, operator=NativeCalc(select=[MAP(CAST(idx AS BIGINT), CAST(idx AS BIGINT)) AS v, true AS a, recordsIn=2000000}]", "[collection-route] [{jobId=cde1f17be2b8b009e34201fd432bea40, attempt=0, subtask=0, recordsOut=2000000, operator=NativeCalc(select=[MAP(CAST(idx AS BIGINT), CAST(idx AS BIGINT)) AS v, true AS a, recordsIn=2000000}]", "[collection-route] [{jobId=a355364ffe70209cb4e8402ce2038cda, attempt=0, subtask=0, recordsOut=2000000, operator=NativeCalc(select=[MAP(CAST(idx AS BIGINT), CAST(idx AS BIGINT)) AS v, true AS a, recordsIn=2000000}]", "[collection-route] [{jobId=5fcbb03ece484b9ae0e24fe9edfdb4ca, attempt=0, subtask=0, recordsOut=2000000, operator=NativeCalc(select=[MAP(CAST(idx AS BIGINT), CAST(idx AS BIGINT)) AS v, true AS a, recordsIn=2000000}]" ], "all_trials": [ "[collection-trial] engine=flink trial=0 warmup=true rows=2000000 seconds=1.699615119", "[collection-trial] engine=native trial=0 warmup=true rows=2000000 seconds=2.113647619", "[collection-trial] engine=native trial=1 warmup=true rows=2000000 seconds=1.523653663", "[collection-trial] engine=flink trial=1 warmup=true rows=2000000 seconds=0.953701654", "[collection-trial] engine=flink trial=2 warmup=false rows=2000000 seconds=0.990207436", "[collection-trial] engine=native trial=2 warmup=false rows=2000000 seconds=1.406646155", "[collection-trial] engine=native trial=3 warmup=false rows=2000000 seconds=1.374041280", "[collection-trial] engine=flink trial=3 warmup=false rows=2000000 seconds=0.937343488", "[collection-trial] engine=flink trial=4 warmup=false rows=2000000 seconds=0.910362044", "[collection-trial] engine=native trial=4 warmup=false rows=2000000 seconds=1.326241650", "[collection-trial] engine=native trial=5 warmup=false rows=2000000 seconds=1.303682351", "[collection-trial] engine=flink trial=5 warmup=false rows=2000000 seconds=0.967528016", "[collection-trial] engine=flink trial=6 warmup=false rows=2000000 seconds=0.930401550", "[collection-trial] engine=native trial=6 warmup=false rows=2000000 seconds=1.242782935" ] }, { "cohort": "previous", "case": "join", "expression": "ARRAY_JOIN(arr,'|','?')", "map_source": false, "type": "STRING", "width": 8, "stock_trials": [ 2.815320966, 2.786018542, 2.762058913, 2.732359919, 2.774763553 ], "native_trials": [ 2.61662973, 2.537013638, 2.958648183, 2.519371075, 2.523565922 ], "route_evidence": [ "[collection-engine] [NativeCalc functions: native=[ARRAY_JOIN], jvm=[]]", "[collection-route] [{subtask=0, recordsOut=2000000, operator=NativeCalc(select=[ARRAY_JOIN(arr, '|', '?') 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seconds=2.958648183", "[collection-trial] engine=native trial=5 warmup=false rows=2000000 seconds=2.519371075", "[collection-trial] engine=flink trial=5 warmup=false rows=2000000 seconds=2.732359919", "[collection-trial] engine=flink trial=6 warmup=false rows=2000000 seconds=2.774763553", "[collection-trial] engine=native trial=6 warmup=false rows=2000000 seconds=2.523565922" ] }, { "cohort": "previous", "case": "typeof", "expression": "TYPEOF(idx)", "map_source": false, "type": "BIGINT", "width": 8, "stock_trials": [ 0.69330732, 0.647366458, 0.682078394, 0.635109388, 0.646496834 ], "native_trials": [ 0.696946424, 0.710713307, 0.612541646, 0.608729223, 0.590439811 ], "route_evidence": [ "[collection-engine] [NativeCalc functions: native=[TYPEOF], jvm=[]]", "[collection-route] [{operator=NativeCalc(select=[TYPEOF(idx) AS v, true AS anchor], nativeFunctions=[TYPEOF], , recordsIn=2000000, jobId=be6fa67606893d96792d2989380483ac, attempt=0, subtask=0, recordsOut=2000000}]", "[collection-route] [{operator=NativeCalc(select=[TYPEOF(idx) AS v, true AS anchor], nativeFunctions=[TYPEOF], , recordsIn=2000000, jobId=2bd6b4792ecf62e96eda1938fff7f5b3, attempt=0, subtask=0, recordsOut=2000000}]", "[collection-route] [{operator=NativeCalc(select=[TYPEOF(idx) AS v, true AS anchor], nativeFunctions=[TYPEOF], , recordsIn=2000000, jobId=beefbc6c3f5cfecad1beeb4a3c92b74f, attempt=0, subtask=0, recordsOut=2000000}]", "[collection-route] [{operator=NativeCalc(select=[TYPEOF(idx) AS v, true AS anchor], nativeFunctions=[TYPEOF], , recordsIn=2000000, jobId=da5e52622864971274f7fa9ce1bd9c27, attempt=0, subtask=0, recordsOut=2000000}]", "[collection-route] [{operator=NativeCalc(select=[TYPEOF(idx) AS v, true AS anchor], nativeFunctions=[TYPEOF], , recordsIn=2000000, jobId=769a721e3ad8e4512ed95b364c9204a2, attempt=0, subtask=0, recordsOut=2000000}]", "[collection-route] [{operator=NativeCalc(select=[TYPEOF(idx) AS v, true AS anchor], nativeFunctions=[TYPEOF], , recordsIn=2000000, 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rows=2000000 seconds=0.647366458", "[collection-trial] engine=flink trial=4 warmup=false rows=2000000 seconds=0.682078394", "[collection-trial] engine=native trial=4 warmup=false rows=2000000 seconds=0.612541646", "[collection-trial] engine=native trial=5 warmup=false rows=2000000 seconds=0.608729223", "[collection-trial] engine=flink trial=5 warmup=false rows=2000000 seconds=0.635109388", "[collection-trial] engine=flink trial=6 warmup=false rows=2000000 seconds=0.646496834", "[collection-trial] engine=native trial=6 warmup=false rows=2000000 seconds=0.590439811" ] }, { "cohort": "candidate", "case": "map", "expression": "MAP[CAST(idx AS BIGINT),CAST(idx AS BIGINT)]", "map_source": false, "type": "BIGINT", "width": 8, "stock_trials": [ 0.924119367, 0.908049763, 0.900911441, 0.876444061, 0.870670879 ], "native_trials": [ 1.435354825, 1.384696766, 1.375432623, 1.3153183, 1.254648704 ], "route_evidence": [ "[collection-engine] [NativeCalc functions: native=[], jvm=[MAP, CAST], reason=MAP 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warmup=false rows=2000000 seconds=0.924119367", "[collection-trial] engine=native trial=2 warmup=false rows=2000000 seconds=1.435354825", "[collection-trial] engine=native trial=3 warmup=false rows=2000000 seconds=1.384696766", "[collection-trial] engine=flink trial=3 warmup=false rows=2000000 seconds=0.908049763", "[collection-trial] engine=flink trial=4 warmup=false rows=2000000 seconds=0.900911441", "[collection-trial] engine=native trial=4 warmup=false rows=2000000 seconds=1.375432623", "[collection-trial] engine=native trial=5 warmup=false rows=2000000 seconds=1.315318300", "[collection-trial] engine=flink trial=5 warmup=false rows=2000000 seconds=0.876444061", "[collection-trial] engine=flink trial=6 warmup=false rows=2000000 seconds=0.870670879", "[collection-trial] engine=native trial=6 warmup=false rows=2000000 seconds=1.254648704" ] }, { "cohort": "candidate", "case": "join", "expression": "ARRAY_JOIN(arr,'|','?')", "map_source": false, "type": "STRING", "width": 8, 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