分享 比 ack 更快更好用的东东：the silver searcher
比 ack 更快，而且还可以跟 vim，textmate，emacs 集成，推荐之。 https://github.com/ggreer/the_silver_searcher
The Silver Searcher
An attempt to make something better than ack (which itself is better than grep).
What's so great about Ag?
- It searches code about 3–5× faster than
ack. - It ignores file patterns from your
.gitignoreand.hgignore. - If there are files in your source repo you don't want to search, just add their patterns to a
.agignorefile. *cough* extern *cough* - The command name is 33% shorter than
ack!
How is it so fast?
- Searching for literals (no regex) uses Boyer-Moore-Horspool strstr.
- Files are
mmap()ed instead of read into a buffer. - If you're building with PCRE 8.21 or greater, regex searches use the JIT compiler.
- Ag calls
pcre_study()before executing the regex on a jillion files. - Instead of calling
fnmatch()on every pattern in your ignore files, non-regex patterns are loaded into an array and binary searched. - Ag uses Pthreads to take advantage of multiple CPU cores and search files in parallel.
I've written several blog posts showing how I've improved performance. These include how I added pthreads, wrote my own scandir(), benchmarked every revision to find performance regressions, and profiled with gprof and Valgrind.
Installation
OS X:
brew install the_silver_searcher
#1 楼 @poshboytl 以前 pick 都是推荐 gem 啥的，感觉不给力阿，以后 pick 要专注于推荐人文方面的东西，技术方面的直接贴到论坛里面好了。
ack blahblahblah ~/code 6.59s user 1.94s system 99% cpu 8.547 total ag blahblahblah ~/code 1.39s user 1.81s system 229% cpu 1.396 total
这个 CPU 利用率也挺高的。看来 ag 比 ack 要更加勤奋一点。
试用了一下，不过 the_silver_searcher 不支持 --nojs 这样的选项，略不爽。
ack 支持几乎所有 filetypes. ack --help-types
#6 楼 @kenshin54 #11 楼 @LarryLv
不知道 .agignore 能不能满足你们的需求？ https://github.com/ggreer/the_silver_searcher/wiki/Advanced-Usage
#15 楼 @baohaojun 牛，不过 ag 表现已经很让我惊艳了，刚刚测试了下：
~ $ brew search beagrep
No formula found for "beagrep". Searching open pull requests...
目前还无法通过 brew 安装，考虑把 beagrep 放到 homebrew 中么？这样的话说不定会帮助推广。
