{ "schemaVersion": 2, "measuredOn": "2026-10-20", "synthetic": true, "independentAudit": false, "fixture": { "synthetic": true, "generator": "scripts/generate-comparison-csv.mjs", "version": 1, "bytes": 15000000000, "decimalGB": 15, "rows": 29296874, "columns": 16, "recordBytes": 512, "lastRecordBytes": 909, "encoding": "UTF-8", "delimiter": ",", "quotedCommaEvery": 97, "embeddedNewlineEvery": 277, "seed": "LCG(index,1664525,1013904223); deterministic; unique row_id", "sha256": "9b6f972a3dbd706ee6a0ebe38c043e8679de352803ed3fcf611228c668d05238", "generationMs": 51336.3679, "cache": "Generated immediately before testing; OS cache not flushed. Not a cold-disk test." }, "environment": { "os": "Windows_NT", "release": "10.0.26200", "arch": "x64", "cpu": "13th Gen Intel(R) Core(TM) i9-13900HX", "logicalCpus": 32, "totalMemoryBytes": 34086969344, "node": "v22.13.0", "python": "3.14.4", "storage": "Samsung MZVL21T0HCLR-00BL2 NVMe SSD; NTFS D: volume" }, "methodology": { "desktop": { "license": "installed Release Preview; no mock entitlement", "clock": "Node monotonic wall time; CDP/UI observation includes IPC and up to 20 ms polling", "memory": "100 ms requested sampling of root plus descendant WebView processes; process-family inventory refreshed about once per second; sampled peak, not guaranteed instantaneous peak; working set can count shared pages more than once", "cache": "OS file cache is uncontrolled; process restarts do not imply cold disk", "confirmation": "Automated click after import preview is ready; excludes human decision time", "keyboard": "Trusted key event through observed selection; CDP round trips included, not frame-rate or INP" }, "comparison": "Same source and verified final record; different product indexing/query outputs. RowCove starts after import confirmation, competitors include open/launch as documented. No uniform first-paint measurement or fastest-product ranking.", "memory": "Requested 200 ms native process-tree sampling; Preview 100 ms. Private commit and RSS reported separately; mapped/shared source pages count in RSS. Scoped logical file-length growth in dedicated TEMP/cache roots, not total machine I/O.", "cache": "OS file cache uncontrolled and never flushed. RowCove Pro starts with fresh application cache each run. EmEditor three runs; Modern CSV two controlled opening runs. One workstation only.", "libraries": { "cache": "OS caches uncontrolled, never flushed; process restarts are not cold-disk tests", "order": "reader order rotates each round; first100 block precedes scan block", "timing": "operationMs excludes Python/module import; processToResultMs includes startup/import/IPC", "memory": "20 ms sampled process-tree RSS including Windows venv launcher child; shared pages may be counted twice. RSS includes mapped file pages. Safety cutoff: 4 GiB private commit (Windows private field, RSS fallback elsewhere), not mapped-file RSS. Not desktop/WebView memory.", "first100": "all 16 fields, inferred types with each library defaults; header and first 100 row IDs plus quoted multiline value validated", "scan": "count rows and sum row_id using projected streaming reads, not full materialization or opening a GUI; RowCove Preview has no equivalent full-file entitlement" }, "limits": "No cold-disk, TB-scale, compressed-file or cross-machine claim. Modern CSV Premium query unmeasured. Automation-contaminated exploratory timings are excluded." }, "desktop": { "name": "RowCove", "version": "0.1.0-preview.20261020.1", "build": "Installed Windows x64 Release Preview; no mock entitlement", "binarySha256": "6bdd13daa6ba063097904349fba0e011d581fc3cb1d066bc6622dfd7fd63a50c", "headerSelection": "Automatically detected; no manual override. Includes import confirmation, UI rendering and CDP observation.", "validatedHeaderAndFirstRecord": true, "automaticHeaders": true, "first100": { "freshProcessMs": [ 978.97, 967.73, 896.11 ], "alreadyRunningMs": [ 345.58, 321.59, 330.42 ], "confirmToGridMs": [ 238.14, 250.71, 201.67 ] }, "memory": { "scope": "Native plus WebView process tree across opening and navigation; sampled peak. Shared RSS pages may be counted more than once.", "treePrivateCommitPeakBytes": [ 611811328, 584142848, 586043392 ], "treeWorkingSetPeakBytes": [ 840159232, 812236800, 814583808 ] }, "renderedRows": [ 30, 30, 30 ] }, "native": { "rowcove": { "edition": "Signed sandbox Pro; Release; no mock entitlement", "runs": [ { "confirmToFirstInteractive": 245, "confirmToCompleteIndex": 19341, "firstQuery": 11047, "repeatQuery": 8, "lastRecordValidated": true, "matches": 292969, "peakPrivateCommitBytes": 529936384, "peakRssBytes": 752959488, "peakScratchGrowthBytes": 5606949 }, { "confirmToFirstInteractive": 249, "confirmToCompleteIndex": 20174, "firstQuery": 11085, "repeatQuery": 9, "lastRecordValidated": true, "matches": 292969, "peakPrivateCommitBytes": 531447808, "peakRssBytes": 753926144, "peakScratchGrowthBytes": 10293931 }, { "confirmToFirstInteractive": 259, "confirmToCompleteIndex": 21554, "firstQuery": 10959, "repeatQuery": 8, "lastRecordValidated": true, "matches": 292969, "peakPrivateCommitBytes": 536776704, "peakRssBytes": 756809728, "peakScratchGrowthBytes": 5606949 } ], "query": "symbol equals DEMO-42; exact CSV streaming predicate plus persistent matching-source-row locators; native Tauri command; 292,969 matches" }, "emeditor": { "version": "26.3.0", "edition": "Professional 7-day trial; read-only /r; separate process /sp", "runs": [ { "nativeOpenReturnMs": 620.53, "fullAccessMs": 3412.53, "queryMs": 1119, "matches": 292969, "lastRecordValidated": true, "peakPrivateCommitBytes": 51314688, "peakRssBytes": 15048339456, "peakScratchGrowthBytes": 0 }, { "nativeOpenReturnMs": 312.85, "fullAccessMs": 4837.85, "queryMs": 1104, "matches": 292969, "lastRecordValidated": true, "peakPrivateCommitBytes": 92958720, "peakRssBytes": 15089397760, "peakScratchGrowthBytes": 0 }, { "nativeOpenReturnMs": 306.57, "fullAccessMs": 4438.57, "queryMs": 1140, "matches": 292969, "lastRecordValidated": true, "peakPrivateCommitBytes": 93368320, "peakRssBytes": 15092342784, "peakScratchGrowthBytes": 0 } ], "query": "Documented native Find Count macro for case-sensitive literal ,DEMO-42,; same matching set on this fixture, count-only output, not a structured result index" }, "moderncsv": { "version": "2.4.4", "edition": "Free; read-only true; auto-fit column width false", "runs": [ { "openingReadyLowerMs": 44231, "openingReadyUpperMs": 45275, "lastRecordValidated": true, "sampleCount": 531, "peakPrivateCommitBytes": 1557565440, "peakRssBytes": 1362436096, "peakScratchGrowthBytes": 23 }, { "openingReadyLowerMs": 44397, "openingReadyUpperMs": 45443, "lastRecordValidated": true, "sampleCount": 736, "peakPrivateCommitBytes": 1558769664, "peakRssBytes": 1364361216, "peakScratchGrowthBytes": 0 } ], "query": { "status": "not-measured", "reason": "Native column filtering requires Premium; no Premium license available. No query timing is claimed." }, "readiness": "CPU idle and native Responding for one second, sampled about 200 ms; a readiness interval/proxy, not first painted frame. Subsequent native navigation/copy verified final row. Resource samples stop before query experiments." }, "optimization": { "baselineRuns": 1, "afterRuns": 3, "beforeFirstQueryMs": 131698, "beforeResources": { "peakPrivateCommitBytes": 1144283136, "peakRssBytes": 1261236224, "peakScratchGrowthBytes": 6383215906 }, "scope": "Same synthetic source and native signed Pro Release. Baseline first UTF-8 filter eagerly built a full columnar cache; revised policy streams first filters and reuses result locators. Full sorting can still prepare columnar data." } }, "libraries": [ { "name": "pandas", "version": "3.0.6", "first100": { "operationMs": [ 8.72, 4.8, 4.59 ], "processToResultMs": [ 498.03, 509.94, 481.49 ], "sampledPeakRssBytes": [ 82604032, 82673664, 82788352 ], "validated": true }, "scan": { "operationMs": [ 42485.71, 39772.25, 41218.49 ], "processToResultMs": [ 42992.58, 40289.58, 41734.35 ], "sampledPeakRssBytes": [ 134967296, 133578752, 133959680 ], "validated": true } }, { "name": "duckdb", "version": "1.5.6", "first100": { "operationMs": [ 382.11, 392.05, 382.15 ], "processToResultMs": [ 660.6, 653.63, 627.01 ], "sampledPeakRssBytes": [ 140484608, 140541952, 139735040 ], "validated": true }, "scan": { "operationMs": [ 10198.42, 10117.16, 8731.23 ], "processToResultMs": [ 10503.81, 10459.59, 9042.93 ], "sampledPeakRssBytes": [ 1013190656, 1079926784, 1044594688 ], "validated": true } }, { "name": "polars", "version": "2.0.0", "first100": { "operationMs": [ 37.64, 10.12, 5.89 ], "processToResultMs": [ 459.97, 400.88, 381.4 ], "sampledPeakRssBytes": [ 65290240, 65708032, 65835008 ], "validated": true }, "scan": { "operationMs": [ 17624.35, 10992.07, 11174.5 ], "processToResultMs": [ 20182.35, 13303.94, 13678.34 ], "sampledPeakRssBytes": [ 15228940288, 15228346368, 15246082048 ], "validated": true } } ] }