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kolkov merged 1 commit into from
Mar 10, 2026
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docs: update benchmark results to v0.12.6 #131

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26 changes: 14 additions & 12 deletions README.md
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Expand Up @@ -60,18 +60,20 @@ func main() {

## Performance

Cross-language benchmarks on 6MB input ([source](https://github.com/kolkov/regex-bench)):

| Pattern | Go stdlib | coregex | vs stdlib |
|---------|-----------|---------|-----------|
| Literal alternation | 600 ms | 5 ms | **113x** |
| Inner `.*keyword.*` | 453 ms | 2 ms | **285x** |
| Suffix `.*\.txt` | 350 ms | <1 ms | **350x+** |
| Multiline `(?m)^/.*\.php` | 103 ms | <1 ms | **100x+** |
| Email validation | 389 ms | <1 ms | **389x+** |
| URL extraction | 350 ms | <1 ms | **350x+** |
| IP address | 825 ms | 10 ms | **82x** |
| Char class `[\w]+` | 670 ms | 112 ms | **6x** |
Cross-language benchmarks on 6MB input, AMD EPYC ([source](https://github.com/kolkov/regex-bench)):

| Pattern | Go stdlib | coregex | Rust regex | vs stdlib | vs Rust |
|---------|-----------|---------|------------|-----------|---------|
| Literal alternation | 483 ms | 4.6 ms | 0.6 ms | **104x** | 7.8x slower |
| Multi-literal | 1401 ms | 12.7 ms | 4.6 ms | **110x** | 2.7x slower |
| Inner `.*keyword.*` | 232 ms | 0.25 ms | 0.28 ms | **926x** | **1.1x faster** |
| Suffix `.*\.txt` | 234 ms | 0.88 ms | 1.07 ms | **266x** | **1.2x faster** |
| Multiline `(?m)^/.*\.php` | 103 ms | 0.65 ms | 0.66 ms | **159x** | **~parity** |
| Email validation | 261 ms | 0.58 ms | 0.21 ms | **449x** | 2.7x slower |
| URL extraction | 258 ms | 0.63 ms | 0.34 ms | **409x** | 1.8x slower |
| IP address | 495 ms | 2.2 ms | 12.0 ms | **230x** | **5.5x faster** |
| Char class `[\w]+` | 525 ms | 40.7 ms | 50.3 ms | **12x** | **1.2x faster** |
| Word repeat `(\w{2,8})+` | 659 ms | 187 ms | 48.3 ms | **3.5x** | 3.8x slower |

**Where coregex excels:**
- Multiline patterns (`(?m)^/.*\.php`) — near Rust parity, 100x+ vs stdlib
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37 changes: 24 additions & 13 deletions ROADMAP.md
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Expand Up @@ -216,24 +216,35 @@ v1.0.0 STABLE → Production release with API stability guarantee

## Performance Targets

### Current (v0.8.20) ✅ ACHIEVED

| Pattern Type | stdlib | coregex | Speedup | Status |
|--------------|--------|---------|---------|--------|
| Inner literal `.*keyword.*` | 12.6ms | 4µs | **3154x** | ✅ |
| Suffix `.*\.txt` | 1.3ms | 855ns | **1549x** | ✅ |
| Suffix alternation `.*\.(txt\|log\|md)` 1KB | 15.5µs | 454ns | **34x** | ✅ |
| Suffix alternation `.*\.(txt\|log\|md)` 1MB | 57ms | 147µs | **385x** | ✅ |
| FindAll `.*@suffix` | 316ms | 3.6ms | **87x** | ✅ |
| Alternation `(foo\|bar\|...)` | 9.7µs | 40ns | **242x** | ✅ |
| Case-insensitive 32KB | 1.2ms | 4.6µs | **263x** | ✅ |
| Character class `\d+` | 6.7µs | 1.5µs | **4.5x** | ✅ |
| Email patterns | 22µs | 2µs | **11x** | ✅ |
### Current (v0.12.6) — AMD EPYC, 6MB input ✅ ACHIEVED

Cross-language benchmarks via [regex-bench](https://github.com/kolkov/regex-bench):

| Pattern | Go stdlib | coregex | Rust regex | vs stdlib | vs Rust |
|---------|-----------|---------|------------|-----------|---------|
| Literal alternation | 483 ms | 4.6 ms | 0.6 ms | **104x** | 7.8x slower |
| Multi-literal | 1401 ms | 12.7 ms | 4.6 ms | **110x** | 2.7x slower |
| Inner `.*keyword.*` | 232 ms | 0.25 ms | 0.28 ms | **926x** | **1.1x faster** |
| Suffix `.*\.txt` | 234 ms | 0.88 ms | 1.07 ms | **266x** | **1.2x faster** |
| Multiline `(?m)^/.*\.php` | 103 ms | 0.65 ms | 0.66 ms | **159x** | **~parity** |
| Email validation | 261 ms | 0.58 ms | 0.21 ms | **449x** | 2.7x slower |
| URL extraction | 258 ms | 0.63 ms | 0.34 ms | **409x** | 1.8x slower |
| IP address | 495 ms | 2.2 ms | 12.0 ms | **230x** | **5.5x faster** |
| Char class `[\w]+` | 525 ms | 40.7 ms | 50.3 ms | **12x** | **1.2x faster** |
| Alpha+digit | 261 ms | 25.7 ms | 11.9 ms | **10x** | 2.1x slower |
| Word+digit | 271 ms | 26.2 ms | 12.0 ms | **10x** | 2.1x slower |
| Word repeat `(\w{2,8})+` | 659 ms | 187 ms | 48.3 ms | **3.5x** | 3.8x slower |
| HTTP methods | 106 ms | 0.90 ms | 0.70 ms | **117x** | 1.2x slower |
| Anchored PHP | 0.00 ms | 0.01 ms | 0.01 ms | ~1x | ~parity |
| Multiline PHP | 103 ms | 0.65 ms | 0.66 ms | **159x** | **~parity** |

**5 patterns faster than Rust**: inner_literal, suffix, IP, char_class, multiline_php.

### Remaining for v1.0.0

| Feature | Status | Priority |
|---------|--------|----------|
| Close Teddy gap vs Rust (7.8x) | Blocked on Go 1.26 archsimd | High |
| ARM NEON SIMD | Planned | Medium |
| Look-around assertions | Planned | Medium |
| API stability guarantee | Required | High |
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