How to Make Ruby CGI Script Faster - CGIを高速化する小手先テクニック -

Nagoya RubyKaigi 02How to MakeRuby CGI Script FasterCGImakoto kuwatahttp://www.kuwata-lab.com/

What Ill talk and not I talk about I dont talk about Why CGI is so slow? Scale out How to improve your Database code? Key Value Store Or other kool topics

Why CGI Scriptis So Slow?

Example Code } } }

Benchmark Process Invocation require cgi cgi = CGI.new render HTML 1.80% 0.87% 39.55% 57.78% Mac OS X 10.6 Ruby 1.8.7-p334 Core2 Duo 2GHz https://gist.github.com/850390

Why CGI is so slow? FACT Process invocation is slow TRUTH Library loading is much slow

Benchmark of require (none) 6.15 1.8.7-p334 erb 9.26 time 15.9 Library loading uri 16.15 is much slower ﬁleutils 17.26 than process cgi 17.31 invocation tmpdir 17.84 ( pstore 19.19 date2 19.4 ) openssl 21.92 tempﬁle 22.53 cgi/session 30.18 yaml 32.27rexml/document 40.96 0 10 20 30 40 50 (ms) https://gist.github.com/850386

Benchmark of require (none) 13.35 1.9.2-p180 erb 21.58 time 30.88 uri 43.42 ﬁleutils 37.52 cgi 25.82 tmpdir 39.07 pstore 48.8 date2 0 openssl 36.16 tempﬁle 53.82 cgi/session 57.38 yaml 81.61rexml/document 109.42 0 20 40 60 80 100 120 (ms) https://gist.github.com/850386

Benchmark of require (none) 1.8.7-p334 erb 1.9.2-p180 time uri 1.9 is slower than ﬁleutils 1.8 for process cgi invocation and tmpdir library loading pstore (1.9 date2 openssl 1.8 ) tempﬁle cgi/session yamlrexml/document 0 20 40 60 80 100 120 (ms)

Case Study: tmpdir tmpdir.rb requires ﬁleutils.rb tmpdir.rb ﬁleutils.rb require

Case Study: tmpdir Change to require only when necessary require

Benchmark before after 17.84tmpdir.rb 6.99 0 5 10 15 20 (ms)

Case Study: delegate DelegateClass makes library loading slow DelegateClass

Benchmark Using DelegateClass Without DelegateClass 17.31 cgi.rb 14.17 22.53tempﬁle.rb 19.29 0 5 10 15 20 25 (ms)

Case Study: openssl Openssl pollutes other libraries openssl require

Case Study: openssl Calculate session id without securerandom.rb securerandom.rb ID

How to ImproveYour Code?

How to improve?

Answer

Benchmark h() is much slower than h(s1) escape_html() when there escape_html(s1) are &<>" characters ( &<>" escape_html() h(s2) h() ) escape_html(s2) h(s3) escape_html(s3) 0 12.5 25 37.5 50s1 : 0 html characters Ruby 1.8.7-p334s2 : 5 html characterss3 : 15 html characters https://gist.github.com/850396

How to improve?

Answer

Answer Ignore + :)

Benchmark Ruby 1.8.7-p334parse1()parse2()parse3() 0 2 4 6 8 Ruby 1.9.2-p180parse1()parse2()parse3() 0 2 4 6 8 https://gist.github.com/850402

How to improve?

Answer

Example Code

Benchmark Ruby 1.8.7-p334parse_nested_query()parse_dotted_query() 0 3.5 7 10.5 14 Ruby 1.9.2-p180parse_nested_query()parse_dotted_query() 0 3.5 7 10.5 14 https://gist.github.com/850407

How to improve? renaming is faster than read&write ( rename )

Answer Moving ﬁle on other partition is too expensive ( )

Answer Set $TMPDIR before loading cgi.rb (require cgi )

How to improve? C/Java style coding is slow in Ruby (C Java , Ruby )

Answer

Conslusion

RubyThere are a lot of code which is not soefﬁcent( )If your code is slow, it is due to yourself,not to Ruby.(Ruby )

one more thing...

Benchmarker Benchmarker Benchmark utility Repeat benchmarks, average results, ...

CGIAlt, CGIExt CGIAlt Fast and cgi.rb compatible http://cgialt.rubyforge.org/ CGIExt Implemented in C http://cgiext.rubyforge.org/

thank you

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How to Make Ruby CGI Script Faster - CGIを高速化する小手先テクニック -

by kwatch on Mar 01, 2011

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