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Bug 764019 - Only rely on the maintenance service to enable preload on Windows. r=taras

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This commit is contained in:
Mike Hommey 2012-06-15 08:22:33 +02:00
parent 88257ed076
commit d4e06e4ad5
1 changed files with 1 additions and 11 deletions
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12
browser/app/nsBrowserApp.cpp
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@ -217,24 +217,14 @@ int main(int argc, char* argv[])
// Don't change the order of these enumeration constants, the order matters
// for reporting telemetry data. If new values are added adjust the
// STARTUP_USING_PRELOAD histogram.
enum PreloadReason { PRELOAD_NONE, PRELOAD_SERVICE, PRELOAD_IOCOUNT };
enum PreloadReason { PRELOAD_NONE, PRELOAD_SERVICE };
PreloadReason preloadReason = PRELOAD_NONE;
// GetProcessIoCounters().ReadOperationCount seems to have little to
// do with actual read operations. It reports 0 or 1 at this stage
// in the program. Luckily 1 coincides with when prefetch is
// enabled. If Windows prefetch didn't happen we can do our own
// faster dll preloading.
// The MozillaMaintenance service issues a command to disable the
// prefetch by replacing all found .pf files with 0 byte read only
// files.
IO_COUNTERS ioCounters;
gotCounters = GetProcessIoCounters(GetCurrentProcess(), &ioCounters);
if (IsPrefetchDisabledViaService()) {
preloadReason = PRELOAD_SERVICE;
} else if ((gotCounters && !ioCounters.ReadOperationCount)) {
preloadReason = PRELOAD_IOCOUNT;
}
if (preloadReason != PRELOAD_NONE)