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-rw-r--r--config/environments/test.rb7
1 files changed, 6 insertions, 1 deletions
diff --git a/config/environments/test.rb b/config/environments/test.rb
index a25c5016a3b..c3b788c038e 100644
--- a/config/environments/test.rb
+++ b/config/environments/test.rb
@@ -8,7 +8,12 @@ Rails.application.configure do
# test suite. You never need to work with it otherwise. Remember that
# your test database is "scratch space" for the test suite and is wiped
# and recreated between test runs. Don't rely on the data there!
- config.cache_classes = false
+
+ # Enabling caching of classes slows start-up time because all controllers
+ # are loaded at initalization, but it reduces memory and load because files
+ # are not reloaded with every request. For example, caching is not necessary
+ # for loading database migrations but useful for handling Knapsack specs.
+ config.cache_classes = ENV['CACHE_CLASSES'] == 'true'
# Configure static asset server for tests with Cache-Control for performance
config.assets.digest = false