どうにもMac OS X Lion でab(ApacheBench)が変なので http_load を使うことにしました。
$ brew install https://raw.github.com/gist/2773495/6a797cfb69b52f7935b1929241061a49427ba9b5/http_load.rb
######################################################################## 100.0%
==> Downloading http://www.acme.com/software/http_load/http_load-12mar2006.tar.gz
######################################################################## 100.0%
==> make
==> make install
rm -f /usr/local/bin/http_load
cp http_load /usr/local/bin
rm -f /usr/local/man/man1/http_load.1
cp http_load.1 /usr/local/man/man1
cp: /usr/local/man/man1: No such file or directory
make: *** [install] Error 1
==> Build Environment
CPU: dual-core 64-bit penryn
MacOS: 10.7.4-x86_64
Xcode: 4.3.2
CC: /usr/bin/clang
CXX: /usr/bin/clang++ => /usr/bin/clang
LD: /usr/bin/clang
CFLAGS: -Os -w -pipe -march=native -Qunused-arguments
CXXFLAGS: -Os -w -pipe -march=native -Qunused-arguments
MAKEFLAGS: -j2
Error: Failed executing: make install (.rb:)
If `brew doctor' does not help diagnose the issue, please report the bug:
https://github.com/mxcl/homebrew/wiki/reporting-bugsエラーになりますが、インストールはできているみたい
$ which http_load
/usr/local/bin/http_load