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authorTom Ritter <tom@mozilla.com>2018-02-20 12:18:30 -0600
committerwolfbeast <mcwerewolf@gmail.com>2018-03-14 11:27:26 +0100
commita32b7f7c4e4e31669e0787e6321d74e4db71e514 (patch)
treee83acb2eb895162f010e7ff9ee2d39548c4d90b4 /dom/performance/Performance.cpp
parentbd819cc43653220abdbfe040ba5c721e9861241c (diff)
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Bug 1430173 - Reduce the precision of all explicit clocks to 2ms. r=baku, a=RyanVM
Backport to ESR where we don't have the ResistFingerprinting component. MozReview-Commit-ID: 9bjycHjR3SF --HG-- extra : transplant_source : %EA%03%21%0A%E9%3F%8E%CD%7C%D79f%96%85%96%00%5D%7F%95X
Diffstat (limited to 'dom/performance/Performance.cpp')
-rwxr-xr-x[-rw-r--r--]dom/performance/Performance.cpp5
1 files changed, 3 insertions, 2 deletions
diff --git a/dom/performance/Performance.cpp b/dom/performance/Performance.cpp
index 17273c55d..8dc239b05 100644..100755
--- a/dom/performance/Performance.cpp
+++ b/dom/performance/Performance.cpp
@@ -21,6 +21,7 @@
#include "mozilla/dom/PerformanceObserverBinding.h"
#include "mozilla/IntegerPrintfMacros.h"
#include "mozilla/Preferences.h"
+#include "mozilla/TimerClamping.h"
#include "WorkerPrivate.h"
#include "WorkerRunnable.h"
@@ -228,9 +229,9 @@ Performance::ClearResourceTimings()
DOMHighResTimeStamp
Performance::RoundTime(double aTime) const
{
- // Round down to the nearest 20us, because if the timer is too accurate people
+ // Round down to the nearest 2ms, because if the timer is too accurate people
// can do nasty timing attacks with it.
- const double maxResolutionMs = 0.020;
+ const double maxResolutionMs = 2;
return floor(aTime / maxResolutionMs) * maxResolutionMs;
}