Closed Bug 814860 Opened 12 years ago Closed 9 months ago

Use a tool to simulate a slow drive

Categories

(Core :: Performance, defect)

defect

Tracking

()

RESOLVED WONTFIX
Performance Impact ?

People

(Reporter: marco, Unassigned)

Details

(Whiteboard: [Snappy])

Sometimes Firefox isn't so performant when there are other I/O-heavy tasks in the system.
We could use a tool to simulate a slow drive to see where the bottlenecks are. It would be really useful to know which files are being read or written when a hang occurs.

If such a tool doesn't exist, we could simply use a rate-limited network filesystem.
Or run it off a USB flash drive. Seriously, Portable Firefox can be brutal at times.
Severity: normal → S3
Performance Impact: --- → ?
Component: General → Performance

This bug was moved into the Performance component.

:marco, could you make sure the following information is on this bug?

  • For slowness or high CPU usage, capture a profile with http://profiler.firefox.com/, upload it and share the link here.
  • For memory usage issues, capture a memory dump from about:memory and attach it to this bug.
  • Troubleshooting information: Go to about:support, click "Copy raw data to clipboard", paste it into a file, save it, and attach the file here.

If the requested information is already in the bug, please confirm it is recent.

Thank you.

Flags: needinfo?(mcastelluccio)
Flags: needinfo?(mcastelluccio)

I don't think this is a tool that we have a high need of at the moment. We can collect profiles from some old reference devices which have very slow disks. Here's a recent example: https://share.firefox.dev/46lRqSL

Status: NEW → RESOLVED
Closed: 9 months ago
Resolution: --- → WONTFIX
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