On 2017-04-03 14:44, Christian Schneider wrote:
Am 01.04.2017 um 05:12 schrieb Yasuo Ohgaki <yohg...@ohgaki.net>:
I noticed that our SHA-3 is inefficient.
=== Ruby SHA3-256 ===
[yohgaki@dev ~]$ cat t2.rb
#!/usr/bin/env ruby
require 'digest/sha2'
$i = 1000000
until $i do
Digest::SHA3.hexdigest("abcdedf", 256)
$i -= 1
end
Two things I noticed:
1) As far as I understand Ruby (and as far as I tested it) this does
not execute the function at all.
Why am I not surprised...
2) For some reason the Ruby implementation yields different results, I
didn't track down why.
Here's another library, which actually works.
https://rubygems.org/gems/sha3
Tests with that one:
time ruby -e 'require "sha3"; 123456.times {
SHA3::Digest::SHA256.hexdigest("abc") }'
user 0m1.597s
sys 0m0.023s
time php -r 'for ($i = 0; $i < 123456; ++$i) hash("sha3-256", "abc");'
user 0m2.497s
sys 0m0.020s
There's a small difference, but I wonder if anybody (except Yasuo)
actually cares?
--
Lauri Kenttä
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