1628903 - Evaluate performance of Read Ahead DLL prefetches

Status: RESOLVED FIXED

(Core :: Widget: Win32, enhancement)

Description

[Emma Malysz]

Attachment: Logfile.CSV.zip

We prefetch a few DLLs on startup (like ExplorerFrame.dll). We should reevaluate our usage of ReadAheadDlls_ThreadStart to see if this is necessary, since the files are eventually read by a content process later in startup.

The Windows Procmon log for the build (https://firefox-ci-tc.services.mozilla.com/api/queue/v1/task/NhgxSmL5TkyNErk72PCbMw/runs/0/artifacts/public/build/target.zip) is attached.

Comment 1

[Emma Malysz]

Here are DLLs and libraries that we have identified as candidates for investigating prefetch: explorerFrame.dll, d3d9.dll, libegl.dll, dwrite.dll, d3dcompiler.dll, nssckibi.dll, cach2 dlls, freebl3.dll, softokn3.dll, firefox.exe

Comment 2

[Emma Malysz]

Attachment: Bug 1628903: testing only - do not prefetch DLLs

Comment 3

[Emma Malysz]

Attachment: Bug 1628903: Prefetch DLLs to improve disk reads on Windows HDD devices.

Comment 5

[Pulsebot]

Pushed by [e-mail]:
https://hg.mozilla.org/integration/autoland/rev/6c10970490f3
Prefetch DLLs to improve disk reads on Windows HDD devices. r=aklotz

Comment 6

[Natalia Csoregi [:nataliaCs]]

https://hg.mozilla.org/mozilla-central/rev/6c10970490f3