add comment aabout hotspots

2018-01-22 20:55:48 +01:00 · 2018-01-22 20:55:48 +01:00 · 098cf7d257
parent 2b5a639d79
commit 098cf7d257
1 changed files with 1 additions and 0 deletions
--- a/lib/gitlab/metrics/concern.rb
+++ b/lib/gitlab/metrics/concern.rb
@ -23,6 +23,7 @@ module Gitlab
          end

          define_singleton_method(name) do
+            # inlining fetch_metric method to avoid method call overhead when instrumenting hot spots
            @@_metrics_provider_cache[name] || init_metric(type, name, opts, &block)
          end
        end