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| author | Xavier Noria <fxn@hashref.com> | 2012-01-12 14:57:58 -0800 |
|---|---|---|
| committer | Xavier Noria <fxn@hashref.com> | 2012-01-12 14:59:08 -0800 |
| commit | a59269d9990ea579610641736e89e6560015b6d8 (patch) | |
| tree | 51e6d39dcc9179921263c67575bf6501afc50c4a /activesupport/lib/active_support | |
| parent | 9c993cb348a37563c0ab7c12ded9c21938cc6781 (diff) | |
| download | rails-a59269d9990ea579610641736e89e6560015b6d8.tar.gz rails-a59269d9990ea579610641736e89e6560015b6d8.tar.bz2 rails-a59269d9990ea579610641736e89e6560015b6d8.zip | |
warns against using temporary subscribers
Diffstat (limited to 'activesupport/lib/active_support')
| -rw-r--r-- | activesupport/lib/active_support/notifications.rb | 4 |
1 files changed, 4 insertions, 0 deletions
diff --git a/activesupport/lib/active_support/notifications.rb b/activesupport/lib/active_support/notifications.rb index f549d2fff3..13f675c654 100644 --- a/activesupport/lib/active_support/notifications.rb +++ b/activesupport/lib/active_support/notifications.rb @@ -68,6 +68,10 @@ module ActiveSupport # Sometimes you do not want to subscribe to an event for the entire life of # the application. There are two ways to unsubscribe. # + # WARNING: The instrumentation framework is designed for long-running subscribers, + # use this feature sparingly because it wipes some internal caches and that has + # a negative impact on performance. + # # === Subscribe While a Block Runs # # You can subscribe to some event temporarily while some block runs. For |