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graphql-libgraphqlparser

Make graphql faster with libgraphqlparser. Ruby bindings to a C-level GraphQL parser.

It's faster:

~/projects/graphql-libgraphqlparser $ bundle exec ruby benchmark.rb
              user     system      total        real
Ruby      0.090000   0.000000   0.090000 (  0.088713)
C         0.010000   0.000000   0.010000 (  0.012827)
~/projects/graphql-libgraphqlparser $ bundle exec ruby benchmark.rb
              user     system      total        real
Ruby      0.090000   0.010000   0.100000 (  0.090548)
C         0.010000   0.000000   0.010000 (  0.013126)
~/projects/graphql-libgraphqlparser $ bundle exec ruby benchmark.rb
              user     system      total        real
Ruby      0.080000   0.000000   0.080000 (  0.090066)
C         0.020000   0.000000   0.020000 (  0.011790)
~/projects/graphql-libgraphqlparser $ bundle show graphql
~/.rbenv/versions/2.1.0/lib/ruby/gems/2.1.0/gems/graphql-0.19.4

Installation

This gem depends on libgraphqlparser (>= 0.5.0). You can install it a few ways:

• Homebrew: brew install libgraphqlparser

• From Source:

  wget https://github.com/graphql/libgraphqlparser/archive/v0.5.0.tar.gz
  tar -xzvf v0.5.0.tar.gz
  cd libgraphqlparser-0.5.0/ && cmake . && make && make install
  

• With heroku-buildpack-libgraphqlparser

Then, install this gem:

gem "graphql-libgraphqlparser"

When you require this gem, it overrides GraphQL.parse:

require "graphql/libgraphqlparser"

Overriding the location of libgraphqlparser

This gem will search for libgraphqlparser at /usr and /usr/local. If you follow the official install instructions, you don't need to do anything else. If however you have installed libgraphqlparser at a different location, you will need to specify it during gem install. Note that the headers needed to compile the extension are not located at the standard include subdirectory but rather include/graphqlparser.

Example override:

export LIBGRAPHQLPARSER_PATH=/my-custom-path
gem install graphql-libgraphqlparser -- \
  --with-graphqlparser-lib=$LIBGRAPHQLPARSER_PATH/lib \
  --with-graphqlparser-include=$LIBGRAPHQLPARSER_PATH/include/graphqlparser

Libgraphqlparser versions

The Ruby gem expects certain versions of libgraphqlparser to be installed. I couldn't figure out how to check this in extconf.rb, so I documented it here:

= 0.5.0 | 0.5.0 <= 0.4.0 | 0.4.0