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@ -17,89 +17,22 @@ Dual-licensed under MIT or the [UNLICENSE](http://unlicense.org).
### Quick example comparing tools ### Quick example comparing tools
Search the entire Linux kernel directory (after running `make`) for This example searches the entire Linux kernel source tree (after running
`[A-Z]+_SUSPEND`, where all matches must be words. `make`) for `[A-Z]+_SUSPEND`, where all matches must be words.
Please remember that a single benchmark is never enough! Please see my Please remember that a single benchmark is never enough! See my
[blog post on `ripgrep`](http://blog.burntsushi.net/ripgrep/) for a very [blog post on `ripgrep`](http://blog.burntsushi.net/ripgrep/)
detailed comparison with more benchmarks and analysis. for a very detailed comparison with more benchmarks and analysis.
First up, `ripgrep`: | Command | Line count | Wall clock time |
| ------- | ---------- | --------------- |
``` | `rg -n -w '[A-Z]+_SUSPEND'` | 450 | **0.245s** |
$ time rg -n -w '[A-Z]+_SUSPEND' | wc -l | `ag -w '[A-Z]+_SUSPEND'` | 450 | 0.753s |
450 | `LC_ALL=C git grep -E -n -w '[A-Z]+_SUSPEND'` | 450 | 0.823s |
| `LC_ALL=en_US.UTF-8 git grep -E -n -w '[A-Z]+_SUSPEND'` | 450 | 2.880s |
real 0m0.245s | `sift --git -n -w '[A-Z]+_SUSPEND'` | 450 | 3.656s |
user 0m1.647s | `pt -w -e '[A-Z]+_SUSPEND'` | 450 | 12.369s |
sys 0m0.377s | `ack -w '[A-Z]+_SUSPEND'` | 1878 | 16.952s |
```
Compared with The Silver Searcher:
```
$ time ag -w '[A-Z]+_SUSPEND' | wc -l
450
real 0m0.753s
user 0m2.033s
sys 0m1.673s
```
Or `git grep`:
```
$ time LC_ALL=C git grep -E -n -w '[A-Z]+_SUSPEND' | wc -l
450
real 0m0.823s
user 0m5.253s
sys 0m0.463s
```
Or `git grep` with Unicode enabled (same as `ripgrep` above):
```
$ time LC_ALL=en_US.UTF-8 git grep -E -n -w '[A-Z]+_SUSPEND' | wc -l
450
real 0m2.880s
user 0m19.323s
sys 0m0.350s
```
Or Sift:
```
$ time sift --git -n -w '[A-Z]+_SUSPEND' | wc -l
450
real 0m3.656s
user 0m56.790s
sys 0m0.650s
```
Or The Platinum Searcher:
```
$ time pt -w -e '[A-Z]+_SUSPEND' | wc -l
450
real 0m12.369s
user 1m50.403s
sys 0m13.857s
```
Or Ack:
```
$ time ack -w '[A-Z]+_SUSPEND' | wc -l
1878
real 0m16.952s
user 0m16.257s
sys 0m0.690s
```
(Yes, `ack` [has](https://github.com/petdance/ack2/issues/445) a (Yes, `ack` [has](https://github.com/petdance/ack2/issues/445) a
[bug](https://github.com/petdance/ack2/issues/14).) [bug](https://github.com/petdance/ack2/issues/14).)