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Ask HN: Must have gems for Ruby on Rails application?

2 points by blohs ↗ HN
I am trying to compile list of must have gems for development, testing and production environment for developing and maintaining Ruby on Rails app.

Format: [environment]:[gem]:[short description]

Thanks!

2 comments

[ 2.0 ms ] story [ 15.7 ms ] thread
blohs
test : parallel_tests : ParallelTests splits tests into even groups (by number of lines or runtime) and runs each group in a single process with its own database.
blohs
development : bullet : Identify and kill n+1 queries, improves performance.