perf: backport v2.1 fixed-width / in-place DML work to the .NET 10 master line - #354

Merged

MPCoreDeveloper merged 54 commits into

perf/fixedwidth-backport

Sep 2, 2026

Commits on Aug 30, 2026

build(net11): retarget codebase to .NET 11 / C# 15 on the v2.1 line (Phase 0 toolchain baseline)
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41e860c
docs(perf): record Phase 0 .NET 11 toolchain completion + verified preview-7 API availability
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653d79c
perf(net11): allocation-free SQL-verb dispatch (FirstToken span) - Phase 5 + net11 benchmark record
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c380772
perf(net11): add guarded Vector512 fast paths to all column-store SUM/MIN/MAX aggregates (Phase 2)
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0db0138
docs(perf): record Phase 2 status - Vector512 aggregates done, codec lane APIs deferred
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97cffa0
bench(v21): add measured V1.9.8 vs V2.0 vs V2.1 performance comparison report
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2d9399c
bench(v21): add targeted micro-benchmarks - measurable net11 JIT + allocation wins
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52c81d5
perf(net11): major single-file SELECT allocation reduction + hot-path batch-log opt-in
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df83040
bench(v21): correct warm CPU numbers + document single-file allocation breakthrough (-99%)
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676d4d9
perf(net11): allocation-free SqlQueryValidator + lock-free plan-cache hit path
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524c611
perf(net11): reuse cached tokenized Parts in SqlParser hot paths (#4 - tokenizer cache-reuse)
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681bf4d
perf(net11): #5 row-materialization + query-path allocation cuts (point reads -18..-37% B/op)
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74403f7
docs(bench): record #5 allocation cuts (+6.4) and update 6.2 single-file numbers
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docs(perf): add 3.3 #5 allocation cuts + remaining struct-enumerator work
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82f1e2d
fix(where): parenthesized OR/AND evaluate correctly + fail-closed unrecognized predicates (#348)
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4337ee1
perf(net11): #5 struct-enumerator refactor — ExecuteQueryStruct point lookups 976->471 B/op (-52%)
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78481c7

Commits on Aug 31, 2026

perf(net11): #6 in-place UPDATE for columnar/append-only storage — fixed-width updates no longer append new versions
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3d4cee7
perf(net11): fix #6 in-place UPDATE throughput - write-only open avoids 5-8ms read-write open per statement (3.5-5.3k ops/s, 0 file growth)
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68cb5da
docs(net11): #6 in-place UPDATE results in V2 plan §3.4 + benchmark comparison
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5b325c7
docs(backlog): add .NET 11 / C# 15 backlog - items blocked until Nov 2026 GA
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980d5c7
perf(net11): #7/#8 single-pass SQL DELETE/UPDATE + PK fast path in batch DML
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13e411b
docs(perf): benchmark note for #7/#8 - harness exercises non-PK batch paths, not the new fast paths
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fbb9616
chore: gitignore comparative benchmark results/ output
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e5d5a4c
perf(net11): field-level in-place patch on columnar UPDATE (fixed-width layout step)
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54b0a5b
perf(singlefile): A1 - primary-key hash index for O(1) point lookups in .scdb mode
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f4cab1a
test(singlefile): A2 - pin in-place block overwrite behavior (same-length update does not grow .scdb)
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654cace
feat(storage): B1 - opt-in fixed-width record layout with out-of-line overflow (SQLite-model)
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docs(perf): record single-file A1/A2 + out-of-line overflow B1 progress
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d8e70be
feat(storage): B3 - overflow arena GC wired into auto-compaction (copy-on-compact)
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9290ecb
feat(storage): B4 - constant-offset early-WHERE / SIMD read wins for fixed-width tables
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9b201bb
feat(storage): B5 - 1.x to 2.0 record-format migration path (legacy -> fixed-width)
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5516328
feat(storage): B6 - overflow arena free-list with in-place block reuse
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feat(storage): B6 - single-file (.scdb) fixed-width record layout + overflow block
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13d4827
feat(storage): B6 - automatic PageBased to Columnar + fixed-width conversion
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571cf80
feat(storage): B6 - cross-session arena free-list (derived from records on load)
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5dbdae1
bench(fixed-width): before/after benchmark vs legacy variable-length records
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perf(storage): B7 - position-aware batch UPDATE + write-behind in-place overwrites
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29e8ffa
perf(update): B8 - zero-deserialize fast patch for indexed WHERE batch updates
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ba30d03

Commits on Sep 1, 2026

perf(read): B9 - direct hash-index point lookup + memoized SQL normalization
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947fc85
perf(insert): B9 - leaner INSERT batch-parse + insert/read micro-benchmarks
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06bec50
fix: critical compression read-path bugs + configurable presets (PR #352)
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f936b0e
fix(storage): serialize all FileStream.Position use - WAL writes raced the write-behind worker
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7cd49d6
perf: WP14 dedicated batch-INSERT fast path + AVX-512 benchmark docs
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2c3064d
fix(sonar): port SonarCloud fixes to 2.1 - bugs, code smells, vulnerabilities
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891ed50
Merge branch 'master' into release/v2.1.0.0
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8bc0d6b

Commits on Sep 2, 2026

Merge branch 'master' into release/v2.1.0.0
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05ccf2c
fix(security): sanitize user-provided database name before logging (CWE-117 log forging)
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165f3f9
fix(security): also sanitize tenantId and remaining log sites for CWE-117
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8eba47b
perf(net11): #7/#8 single-pass SQL DELETE/UPDATE + PK fast path in batch DML
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79877ab
Merge branch 'release/v2.1.0.0' into perf/fixedwidth-backport (runtime-agnostic perf backport)
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a029cf1
perf(update): faster + correct in-place batch UPDATE (read-side, phase 1)
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08bd7eb
perf(dml): regex-free canonical batch UPDATE/DELETE parse (phase 2 slice 1)
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c1fdcab
bench: add --pk fair-usage scenario (SharpCoreDB vs SQLite on an id PK table)
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761593a
ci: keep master's .NET 10 CI workflows on the backport branch
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b451d8b