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A high performance Ruby web server
C Ruby
branch: master
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bin code dump
ext/racer code dump
lib code dump
.gitignore code dump
.gitmodules code dump
LICENSE code dump code dump
Rakefile code dump
racer.gemspec code dump


A Rack-compliant ruby web server. It's written in C cuz its fast.

sick ride

racer is almost as fast as this car


The following Rack app was used benchmark WEBrick, Unicorn, Thin and Racer:

run ->env { [200, { "Content-Type" => "text/html" }, ["hello world"]] }

Tests were carried out on a 64 bit Linux VM running on an Intel Core i7 980X.

ApacheBench was used to run the benchmarks with the following options:

ab -n 10000 -c <...>

Here are the results:


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