Gitignore test-generated xlsx fixtures

[benbernard]

Summary

• Add test-generated xlsx files to .gitignore
• Remove tests/fixtures/*.xlsx from git tracking (regenerated by fromxls tests in beforeAll)

🤖 Generated with Claude Code

[github-actions]

Performance Benchmark Results

⚠️ 11 regressions detected out of 103 benchmarks (threshold: 25%)

Benchmark	Median	Baseline	Delta
InputStream.fromString — 100 records	369.3µs	207.8µs	+77.7% 🔴
KeySpec — deep nested (address/coords/lat)	1.14ms	562.4µs	+101.9% 🔴
Direct property access baseline (rec['name'])	81.1µs	42.0µs	+92.9% 🔴
collate — 100 records (count by city)	456.3µs	356.1µs	+28.2% 🔴
chain — 5 ops (grep	eval	grep	eval
implicit — 2 ops (grep	eval), 1K records	191.3µs	113.8µs
chain — 2 ops (grep	eval), 10K records	629.1µs	469.1µs
implicit — 3 ops (grep	eval	grep), 100 records	144.9µs
implicit — 3 ops (grep	eval	grep), 1K records	212.2µs
implicit — 5 ops (grep	eval	grep	eval
TextDecoderStream — 10K lines	6.06ms	3.84ms	+57.7% 🔴

103 benchmarks: 16 faster, 19 slower, 68 within noise (10%)

ℹ️ Note: Benchmarks are advisory-only. GitHub Actions shared runners have variable performance, so results may fluctuate ±25% between runs. For reliable benchmarking, run locally with bun run bench.

Full benchmark results

JSON Parsing

Benchmark	Median	Baseline	Delta	Throughput
Record.fromJSON — 100 lines	151.1µs	151.4µs	-0.3%	661.96K rec/s
Record.fromJSON — 10K lines	13.69ms	12.78ms	+7.1%	730.25K rec/s, 216.3 MB/s
InputStream.fromString — 100 records	369.3µs	207.8µs	+77.7% 🔴	270.78K rec/s
InputStream.fromString — 10K records	18.99ms	17.98ms	+5.6%	526.58K rec/s, 155.9 MB/s
JSON.parse baseline — 10K lines (no Record)	12.86ms	12.57ms	+2.3%	777.60K rec/s, 230.3 MB/s
JSON.parse single array — 10K records	13.45ms	12.77ms	+5.4%	743.38K rec/s, 220.2 MB/s

JSON Serialization

Benchmark	Median	Baseline	Delta	Throughput
Record.toString — 100 records	82.3µs	84.6µs	-2.7%	1.22M rec/s
Record.toString — 10K records	8.59ms	6.92ms	+24.1% 🔴	1.16M rec/s, 344.8 MB/s
Record.toJSON — 10K records	288.4µs	308.0µs	-6.4%	34.68M rec/s
JSON.stringify baseline — 10K objects (no Record)	6.75ms	7.86ms	-14.1% 🟢	1.48M rec/s, 438.5 MB/s
Batch join — 10K records (map+join)	8.61ms	8.49ms	+1.4%	1.16M rec/s, 344.0 MB/s

KeySpec Access

Benchmark	Median	Baseline	Delta	Throughput
KeySpec — simple key (name)	407.3µs	402.2µs	+1.3%	24.55M rec/s
KeySpec — nested key (address/zip)	612.5µs	542.7µs	+12.9% 🔴	16.33M rec/s
KeySpec — deep nested (address/coords/lat)	1.14ms	562.4µs	+101.9% 🔴	8.81M rec/s
KeySpec — array index (tags/#0)	563.1µs	528.1µs	+6.6%	17.76M rec/s
Direct property access baseline (rec['name'])	81.1µs	42.0µs	+92.9% 🔴	123.33M rec/s
Direct nested access baseline (rec.address.coords.lat)	82.8µs	77.1µs	+7.4%	120.76M rec/s
KeySpec construction — cached (same spec 10K times)	278.5µs	285.8µs	-2.5%	35.90M rec/s
KeySpec construction — unique specs (10K different)	2.67ms	2.27ms	+17.4% 🔴	3.75M rec/s
Compiled KeySpec.resolveValue — nested (address/zip)	159.8µs	303.7µs	-47.4% 🟢	62.56M rec/s
Compiled KeySpec.resolveValue — deep (address/coords/lat)	236.0µs	226.9µs	+4.0%	42.37M rec/s
Compiled KeySpec.resolveValue — array (tags/#0)	154.9µs	287.2µs	-46.1% 🟢	64.55M rec/s
Compiled KeySpec.setValue — nested (address/zip)	130.8µs	155.5µs	-15.9% 🟢	76.44M rec/s

Core Operations

Benchmark	Median	Baseline	Delta	Throughput
grep — 10K records (r.age > 50)	374.3µs	432.2µs	-13.4% 🟢	26.72M rec/s
grep — 10K records (string match)	364.6µs	359.7µs	+1.4%	27.43M rec/s
eval — 10K records (add computed field)	1.38ms	1.32ms	+5.0%	7.23M rec/s
xform — 10K records (push each record)	1.07ms	1.06ms	+1.2%	9.34M rec/s
sort — 100 records (by score, numeric)	185.6µs	160.8µs	+15.4% 🔴	538.82K rec/s
sort — 10K records (by score, numeric)	17.76ms	17.99ms	-1.3%	563.07K rec/s
sort — 10K records (by name, lexical)	12.04ms	13.42ms	-10.3% 🟢	830.69K rec/s
collate — 100 records (count by city)	456.3µs	356.1µs	+28.2% 🔴	219.13K rec/s
collate — 10K records (count by city)	12.66ms	11.76ms	+7.7%	789.92K rec/s
fromcsv — 10K rows (parse CSV to records)	14.64ms	16.25ms	-9.9%	683.21K rec/s, 44.9 MB/s

Pipeline Overhead

Benchmark	Median	Baseline	Delta	Throughput
chain — single op (grep), 10K records	7.11ms	7.42ms	-4.1%	1.41M rec/s
chain — 3 ops (grep	eval	grep), 10K records	7.67ms	8.37ms
chain — 5 ops (grep	eval	grep	eval	grep), 10K records
passthrough baseline — 10K records (direct collector)	6.18ms	6.29ms	-1.8%	1.62M rec/s

Record Creation & Serialization

Benchmark	Median	Baseline	Delta	Throughput
new Record() — 10K objects	71.2µs	70.8µs	+0.6%	140.43M rec/s
new Record() empty — 10K	101.4µs	95.0µs	+6.7%	98.62M rec/s
Record.get — 10K records × 3 fields	93.5µs	100.3µs	-6.8%	321.00M rec/s
Record.set — 10K records × 1 field	126.1µs	122.6µs	+2.8%	79.33M rec/s
Record.toJSON — 10K records	287.4µs	308.0µs	-6.7%	34.79M rec/s
Record.toString — 10K records	6.86ms	6.92ms	-0.9%	1.46M rec/s
Record.clone — 10K records	6.14ms	6.69ms	-8.1%	1.63M rec/s
Record.fromJSON — 10K lines	12.84ms	12.78ms	+0.5%	778.52K rec/s, 230.6 MB/s
Record.dataRef — 10K records (zero-copy)	37.6µs	37.8µs	-0.5%	266.10M rec/s
Record.sort — 10K records (numeric field)	11.06ms	11.97ms	-7.7%	904.46K rec/s
Record.sort — 10K records (lexical field)	5.73ms	5.91ms	-3.0%	1.75M rec/s
Record.cmp — 1M comparisons (single field)	108.36ms	122.61ms	-11.6% 🟢	9.23M rec/s
Record.sort — 10K records (nested field numeric)	15.35ms	16.04ms	-4.3%	651.28K rec/s
Record.cmp — 1M comparisons (multi-field cached)	91.82ms	85.19ms	+7.8%	10.89M rec/s
Record.sort — 10K records (cached comparator reuse)	11.56ms	11.68ms	-1.0%	865.33K rec/s

Chain vs Pipe

Benchmark	Median	Baseline	Delta	Throughput
chain — 2 ops (grep	eval), 100 records	61.5µs	129.7µs	-52.6% 🟢
pipe — 2 ops (grep	eval), 100 records	513.24ms	507.45ms	+1.1%
implicit — 2 ops (grep	eval), 100 records	86.9µs	124.2µs	-30.0% 🟢
chain — 2 ops (grep	eval), 1K records	102.5µs	122.2µs	-16.1% 🟢
pipe — 2 ops (grep	eval), 1K records	510.22ms	501.81ms	+1.7%
implicit — 2 ops (grep	eval), 1K records	191.3µs	113.8µs	+68.0% 🔴
chain — 2 ops (grep	eval), 10K records	629.1µs	469.1µs	+34.1% 🔴
pipe — 2 ops (grep	eval), 10K records	512.35ms	508.68ms	+0.7%
implicit — 2 ops (grep	eval), 10K records	474.2µs	669.3µs	-29.2% 🟢
chain — 3 ops (grep	eval	grep), 100 records	73.7µs	170.1µs
pipe — 3 ops (grep	eval	grep), 100 records	763.98ms	749.36ms
implicit — 3 ops (grep	eval	grep), 100 records	144.9µs	92.3µs
chain — 3 ops (grep	eval	grep), 1K records	195.9µs	207.1µs
pipe — 3 ops (grep	eval	grep), 1K records	771.65ms	753.55ms
implicit — 3 ops (grep	eval	grep), 1K records	212.2µs	134.7µs
chain — 3 ops (grep	eval	grep), 10K records	410.9µs	472.1µs
pipe — 3 ops (grep	eval	grep), 10K records	771.10ms	752.54ms
implicit — 3 ops (grep	eval	grep), 10K records	432.1µs	475.7µs
chain — 5 ops (grep	eval	grep	eval	grep), 100 records
pipe — 5 ops (grep	eval	grep	eval	grep), 100 records
implicit — 5 ops (grep	eval	grep	eval	grep), 100 records
chain — 5 ops (grep	eval	grep	eval	grep), 1K records
pipe — 5 ops (grep	eval	grep	eval	grep), 1K records
implicit — 5 ops (grep	eval	grep	eval	grep), 1K records
chain — 5 ops (grep	eval	grep	eval	grep), 10K records
pipe — 5 ops (grep	eval	grep	eval	grep), 10K records
implicit — 5 ops (grep	eval	grep	eval	grep), 10K records

Line Reading

Benchmark	Median	Baseline	Delta	Throughput
InputStream.fromFile — 100 lines	478.5µs	480.3µs	-0.4%	208.99K rec/s, 61.7 MB/s
InputStream.fromString — 100 lines	197.9µs	187.8µs	+5.4%	505.32K rec/s, 149.3 MB/s
manual buffer (isolated) — 100 lines	283.8µs	236.5µs	+20.0% 🔴	352.35K rec/s, 104.1 MB/s
bulk text + split — 100 lines	99.9µs	93.7µs	+6.6%	1.00M rec/s, 295.7 MB/s
node readline — 100 lines	466.8µs	455.1µs	+2.6%	214.22K rec/s, 63.3 MB/s
TextDecoderStream — 100 lines	255.6µs	261.4µs	-2.2%	391.22K rec/s, 115.6 MB/s
binary newline scan — 100 lines	270.6µs	262.5µs	+3.1%	369.50K rec/s, 109.1 MB/s
bun native stdin — 100 lines	25.68ms	24.47ms	+4.9%	3.89K rec/s, 1.2 MB/s
InputStream.fromFile — 10K lines	23.75ms	23.46ms	+1.2%	421.07K rec/s, 124.7 MB/s
InputStream.fromString — 10K lines	18.10ms	17.44ms	+3.8%	552.49K rec/s, 163.6 MB/s
manual buffer (isolated) — 10K lines	6.30ms	6.36ms	-1.0%	1.59M rec/s, 470.1 MB/s
bulk text + split — 10K lines	2.52ms	2.25ms	+11.9% 🔴	3.97M rec/s, 1177.1 MB/s
node readline — 10K lines	9.36ms	8.98ms	+4.2%	1.07M rec/s, 316.5 MB/s
TextDecoderStream — 10K lines	6.06ms	3.84ms	+57.7% 🔴	1.65M rec/s, 488.9 MB/s
binary newline scan — 10K lines	7.85ms	7.55ms	+3.9%	1.27M rec/s, 377.3 MB/s
bun native stdin — 10K lines	42.24ms	43.16ms	-2.1%	236.75K rec/s, 70.1 MB/s
InputStream.fromFile — 100K lines	259.18ms	257.15ms	+0.8%	385.84K rec/s, 114.7 MB/s
InputStream.fromString — 100K lines	206.74ms	207.41ms	-0.3%	483.70K rec/s, 143.7 MB/s
manual buffer (isolated) — 100K lines	38.13ms	35.91ms	+6.2%	2.62M rec/s, 779.4 MB/s
bulk text + split — 100K lines	29.95ms	26.03ms	+15.1% 🔴	3.34M rec/s, 992.1 MB/s
node readline — 100K lines	88.76ms	82.91ms	+7.1%	1.13M rec/s, 334.8 MB/s
TextDecoderStream — 100K lines	44.92ms	38.41ms	+17.0% 🔴	2.23M rec/s, 661.5 MB/s
binary newline scan — 100K lines	75.63ms	75.44ms	+0.2%	1.32M rec/s, 392.9 MB/s
bun native stdin — 100K lines	126.48ms	119.95ms	+5.4%	790.65K rec/s, 234.9 MB/s