[pref] Update docs

2017-05-25 10:39:19 +01:00 · 2017-05-25 10:39:19 +01:00 · c5d14a85ec
parent 14199d6d10
commit c5d14a85ec
1 changed files with 2 additions and 0 deletions
--- a/docs/modules/perf.md
+++ b/docs/modules/perf.md
@ -30,6 +30,8 @@ const trace = firebase.perf().newTrace("test_trace");

 ### Trace

+!> Once a trace has been started and stopped, you cannot re-start it in the same app lifecycle.
+
 #### start()

 Initializes the trace to start tracing performance to relay back to Firebase.