Benchmarks Code quality
ESLint vs Biome
Every candidate on one rig, from the same samples. Winners come from the numbers alone; the story is in the post.
Tests
Test 1 Time per pass
20 measured passes over the corpus. Box is the middle half of the runs, line is the median, whiskers reach the fastest and slowest pass, dots are every run. (LOWER ms = FASTER)
ESLint
BiomeAll 20 samples as a table
| Run | ESLint | Biome |
|---|---|---|
| 1 | 108.8 ms | 75.1 ms |
| 2 | 105.9 ms | 74.0 ms |
| 3 | 107.2 ms | 73.6 ms |
| 4 | 107.5 ms | 72.1 ms |
| 5 | 105.2 ms | 75.3 ms |
| 6 | 105.5 ms | 78.7 ms |
| 7 | 105.2 ms | 79.6 ms |
| 8 | 104.6 ms | 78.5 ms |
| 9 | 104.2 ms | 79.4 ms |
| 10 | 108.9 ms | 76.3 ms |
| 11 | 108.7 ms | 77.8 ms |
| 12 | 103.5 ms | 76.2 ms |
| 13 | 104.9 ms | 74.6 ms |
| 14 | 106.4 ms | 75.4 ms |
| 15 | 106.9 ms | 72.8 ms |
| 16 | 105.4 ms | 75.6 ms |
| 17 | 105.9 ms | 74.8 ms |
| 18 | 105.6 ms | 72.5 ms |
| 19 | 105.6 ms | 75.1 ms |
| 20 | 104.8 ms | 71.5 ms |
Winner Biome (75.4 ms)
Full report, as hyperfine prints it
Benchmark 1: ESLint 9.34.0
- Time (mean ± σ)
- 106.0 ms ± 1.5 ms
- Range (min … max)
- 103.5 ms … 108.9 ms
- Median
- 105.6 ms 20 runs
Benchmark 2: Biome 2.2.2fastest
- Time (mean ± σ)
- 75.4 ms ± 2.4 ms
- Range (min … max)
- 71.5 ms … 79.6 ms
- Median
- 75.2 ms 20 runs
Test conditions: rig, corpus, protocol
- Machine
- MacBook Pro
- Chip
- Apple M2 Max
- Cores
- 12 CPU cores
- Memory
- 96 GB
- OS
- macOS 26.5.2 (arm64)
- Runtime
- Bun 1.4.0
Rig
- Name
- ESLint 9.34.0 library source
- Source
node_modules/eslint/lib/**/*.js- Files
- 391
- Lines
- 99,880
- Size
- 2.73 MB
Corpus
- Warmups
- 3 unmeasured passes
- Measured
- 20 passes per tool
- Process
- A new CLI process for every measured pass
- Cache
- Warm filesystem cache after three unmeasured passes
- Output
- Diagnostics produced and redirected away from the terminal
Protocol
Scorecard
| Candidate | Time per pass (ms, lower is better) |
|---|---|
| ESLint | 106.0 ms |
| Biome | 75.4 ms |