mirror of https://github.com/golang/go.git
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XOR key into data 128 bits at a time instead of 64 bits and pipeline half of state loads. Rotate loop to allow single-register indexing for state[i]. On a MacBookPro10,2 (Core i5): benchmark old ns/op new ns/op delta BenchmarkRC4_128 412 224 -45.63% BenchmarkRC4_1K 3179 1613 -49.26% BenchmarkRC4_8K 25223 12545 -50.26% benchmark old MB/s new MB/s speedup BenchmarkRC4_128 310.51 570.42 1.84x BenchmarkRC4_1K 322.09 634.48 1.97x BenchmarkRC4_8K 320.97 645.32 2.01x For comparison, on the same machine, openssl 0.9.8r reports its rc4 speed as somewhat under 350 MB/s for both 1K and 8K (it is operating 64 bits at a time). On an Intel Xeon E5520: benchmark old ns/op new ns/op delta BenchmarkRC4_128 418 259 -38.04% BenchmarkRC4_1K 3200 1884 -41.12% BenchmarkRC4_8K 25173 14529 -42.28% benchmark old MB/s new MB/s speedup BenchmarkRC4_128 306.04 492.48 1.61x BenchmarkRC4_1K 319.93 543.26 1.70x BenchmarkRC4_8K 321.61 557.20 1.73x For comparison, on the same machine, openssl 1.0.1 reports its rc4 speed as 587 MB/s for 1K and 601 MB/s for 8K. R=agl CC=golang-dev https://golang.org/cl/7865046 |
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| LICENSE | ||
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| README | ||
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README
This is the source code repository for the Go programming language.
For documentation about how to install and use Go,
visit http://golang.org/ or load doc/install.html in your web browser.
After installing Go, you can view a nicely formatted
doc/install.html by running godoc --http=:6060
and then visiting http://localhost:6060/doc/install.html.
Unless otherwise noted, the Go source files are distributed
under the BSD-style license found in the LICENSE file.
--
Binary Distribution Notes
If you have just untarred a binary Go distribution, you need to set
the environment variable $GOROOT to the full path of the go
directory (the one containing this README). You can omit the
variable if you unpack it into /usr/local/go, or if you rebuild
from sources by running all.bash (see doc/install.html).
You should also add the Go binary directory $GOROOT/bin
to your shell's path.
For example, if you extracted the tar file into $HOME/go, you might
put the following in your .profile:
export GOROOT=$HOME/go
export PATH=$PATH:$GOROOT/bin
See doc/install.html for more details.