Bundler just annouced
--jobs support, which allows for multithreading gem installs -- I haven't looked at the code, but my guess is it's making use of the
JOBS flag support in
gmake (which multithreads C compilation) for navtive libs.
Anyway, here's my quick timing comparison on bundling a very large project with hundrends of gems:
rm -rf vendor/bundle bundle install --path vendor/bundle # time: 5:31.40 total rm -rf vendor/bundle gem install bundler -v 1.4.0.pre.1 --pre bundle install --jobs=4 --path vendor/bundle # time: 3:10.38 total