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A hack to measure how long it takes to require bundled gems in a rails app
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| REQUIRE_DATA = {} | |
| BUNDLED_GEMS = `bundle show | grep "*" | awk '{print $2}'`.split("\n").sort | |
| require 'bigdecimal' | |
| def require(name) | |
| start = Time.now | |
| ret = super | |
| stop = Time.now | |
| total = BigDecimal(stop-start, 6) | |
| REQUIRE_DATA[name] = total if BUNDLED_GEMS.include?(name) | |
| ret | |
| end | |
| def require_summary! | |
| require_info = REQUIRE_DATA.to_a.sort_by(&:last).reverse | |
| File.open("requires.log", "w") do |f| | |
| require_info.each do |gem, time| | |
| f << "#{gem}|#{time}\n" | |
| end | |
| end | |
| end |
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| sass-rails|0.350504 | |
| rails-html-sanitizer|0.0841502 | |
| loofah|0.0807085 | |
| nokogiri|0.06919 | |
| slim|0.0590941 | |
| coffee-rails|0.0531291 | |
| coffee-script|0.0510261 | |
| execjs|0.0493581 | |
| arel|0.042798 | |
| validates_timeliness|0.0417477 | |
| timeliness|0.0228528 | |
| tzinfo|0.0221143 | |
| gretel|0.020622 | |
| concord|0.0199939 | |
| adamantium|0.0181447 | |
| axiom-types|0.0180199 | |
| erubis|0.0161383 | |
| coercible|0.0148004 | |
| rom-sql|0.0141706 | |
| rom-rails|0.0109552 | |
| warden|0.0062394 | |
| bcrypt|0.00602871 | |
| memoizable|0.00388941 | |
| i18n|0.00387294 | |
| inflecto|0.00230061 | |
| bootstrap-sass|0.00190944 | |
| jquery-rails|0.00149442 | |
| transproc|0.00140992 | |
| jquery-ui-rails|0.00140623 | |
| charlatan|0.0012355 | |
| temple|0.000799056 | |
| ref|0.000597096 | |
| hike|0.000403201 | |
| rspec-rails|0.000357722 | |
| rails|0.000013796 | |
| tilt|0.000012404 | |
| thread_safe|0.00001217 | |
| json|0.00001214 | |
| thor|0.000011942 | |
| neat|0.000011416 | |
| virtus|0.000011168 | |
| rom|0.000010758 | |
| sequel|0.000010697 | |
| sass|0.00001034 | |
| sprockets|0.000009684 | |
| descendants_tracker|0.00000799 | |
| bourbon|0.000007212 | |
| equalizer|0.000006448 | |
| bitters|0.000006435 | |
| ice_nine|0.000006426 | |
| refills|0.000005494 | |
| rack|0.00000447 |
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| # paste above hack at the top of your config/application.rb | |
| # HERE GOES YOUR application.rb | |
| # at the end: | |
| require_summary! | |
| # look at requires.log that was created |
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As pointed out - it would give much better results when you run it in an isolated script where you require individual gem once and append time to the log.