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Bundle Benchmark

💎 Because loading gems can take longer than you think

bundle_benchmark
............................................................[DONE]

Gem                            Time(sec)     Pct %
--------------------------------------------------
rails                             2.4161     26.9%
mongoid                           0.9279     10.3%
fog                               0.7707      8.6%
newrelic_rpm                      0.5839      6.5%
geocoder                          0.3578      4.0%
delayed_job                       0.3162      3.5%
bitly                             0.2703      3.0%
sass                              0.2651      3.0%
tire                              0.2592      2.9%
--------------------------------------------------
Total                             4.8583    100.0%

Forked from this awesome gist by Pan Thomakos

Installation

gem install bundle_benchmark

No need to add it to your Gemfile.

Use It

In your project directory, run:

bundle_benchmark

To benchmark a specific Gemfile, run:

BUNDLE_GEMFILE=~/Projects/project_n/Gemfile bundle_benchmark

To only require certain groups - like Rails does - do

# default rails development groups
BUNDLE_GROUPS=default,development,assets bundle_benchmark

Now What?

Read this article

https://iain.nl/getting-the-most-out-of-bundler-groups

The Results

I was able to reduce gem load time from 12.1 seconds to 6.7 seconds - over 5 seconds!

Here’s what I did:

  1. Added :console group like the article above suggested

  2. Commented out ruby-prof, oink, and debugger when not in use

  3. Moved newrelic_rpm and turbo-sprockets-rails3 to :staging, :production groups

  4. Removed unused gems

Bonus

bin/rails console # or server, etc

is faster than

bundle exec rails console

Try it yourself

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Because loading gems can take longer than you think

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