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| author | amit@chromium.org <amit@chromium.org@0039d316-1c4b-4281-b951-d872f2087c98> | 2010-06-28 18:44:47 +0000 |
|---|---|---|
| committer | amit@chromium.org <amit@chromium.org@0039d316-1c4b-4281-b951-d872f2087c98> | 2010-06-28 18:44:47 +0000 |
| commit | 2535e637b7da1d6f530bf8f0a6c482c703d2c1f7 (patch) | |
| tree | 76c41c070e24ca9845f99b2ebf028a1be2152a75 | |
| parent | 684dd5258a8895b5d5af069319ea11ab513cf912 (diff) | |
| download | chromium_src-2535e637b7da1d6f530bf8f0a6c482c703d2c1f7.zip chromium_src-2535e637b7da1d6f530bf8f0a6c482c703d2c1f7.tar.gz chromium_src-2535e637b7da1d6f530bf8f0a6c482c703d2c1f7.tar.bz2 | |
Cold startup performance boost by enabling prefetch hints on Windows
A prefetch file is automatically generated by recording hard page faults
during process
startup. It's
used to speed up the process startup the next time by prefetching those
pages. By default, one prefetch file is maintained per exe.
Since chrome.exe is launched in different modes (browser, renderer, plugin etc.), we
want different prefetch profiles per process type. This is achieved by appending a
'/Prefetch:<integer type>' on the command line.
This has shown a 20% improvement in cold startup in ChromeFrameStartupTestActiveX.PerfCold
on XP, will watch perf dashboards improvements.
TEST=none
BUG=44129
Review URL: http://codereview.chromium.org/2810033
git-svn-id: svn://svn.chromium.org/chrome/trunk/src@51006 0039d316-1c4b-4281-b951-d872f2087c98
| -rw-r--r-- | chrome/common/sandbox_policy.cc | 5 |
1 files changed, 5 insertions, 0 deletions
diff --git a/chrome/common/sandbox_policy.cc b/chrome/common/sandbox_policy.cc index db38a42..aa5249f 100644 --- a/chrome/common/sandbox_policy.cc +++ b/chrome/common/sandbox_policy.cc @@ -430,6 +430,11 @@ base::ProcessHandle StartProcessWithAccess(CommandLine* cmd_line, bool child_needs_help = DebugFlags::ProcessDebugFlags(cmd_line, type, in_sandbox); + // Prefetch hints on windows: + // Using a different prefetch profile per process type will allow Windows + // to create separate pretetch settings for browser, renderer etc. + cmd_line->AppendLooseValue(StringPrintf(L"/prefetch:%d", type)); + if (!in_sandbox) { base::LaunchApp(*cmd_line, false, false, &process); return process; |