ISSUE-3: Animation frame times should be monotonically increasing

monotonic-clock

Animation frame times should be monotonically increasing

State:
CLOSED
Product:
Request Animation Frame
Raised by:
Cameron McCormack
Opened on:
2011-05-18
Description:
Having animation frame times run off a monotonic clock would be better for authors than a clock that might jump backwards. Doing this argues for the reinclusion of the Window.animationStartTime attribute, so that scripts can avoid using Date.now() to record the animation start time, which might bear little relation to the monotonic clock values anyway.
Related Actions Items:
Related emails:
  1. Re: [minutes] Web Performance WG Teleconference #115 2013-07-31 (from jamesr@google.com on 2013-07-31)
  2. RE: [minutes] 2012-10-10 Web Performance WG Teleconference #84 (from jmann@microsoft.com on 2012-10-11)
  3. TPAC 2011 Web Performance WG 2011-11-01 (from jmann@microsoft.com on 2011-11-09)
  4. [minutes] 20110727 Web Performance WG Teleconference #43 (from jmann@microsoft.com on 2011-07-27)
  5. [RequestAnimationFrame] Summary of open issue status (from jamesr@google.com on 2011-07-26)
  6. [minutes] 20110720 Web Performance WG Teleconference #42 (from jmann@microsoft.com on 2011-07-20)
  7. [minutes] 20110706 Web Performance WG Teleconference #40 (from jmann@microsoft.com on 2011-07-06)
  8. [minutes] 20110629 Web Performance WG Teleconference #39 (from jmann@microsoft.com on 2011-06-30)
  9. RE: ISSUE-3 (monotonic-clock): Animation frame times should be monotonically increasing [Request Animation Frame] (from Nic.Jansma@microsoft.com on 2011-05-23)
  10. Re: ISSUE-3 (monotonic-clock): Animation frame times should be monotonically increasing [Request Animation Frame] (from robert@ocallahan.org on 2011-05-23)
  11. RE: ISSUE-3 (monotonic-clock): Animation frame times should be monotonically increasing [Request Animation Frame] (from jmann@microsoft.com on 2011-05-19)
  12. Re: ISSUE-3 (monotonic-clock): Animation frame times should be monotonically increasing [Request Animation Frame] (from jamesr@google.com on 2011-05-18)
  13. ISSUE-3 (monotonic-clock): Animation frame times should be monotonically increasing [Request Animation Frame] (from sysbot+tracker@w3.org on 2011-05-18)

Related notes:

I think we should base this off of common infrastructure and not define something new within the requestAnimationFrame spec. Since no such common infrastructure exists yet, let's postpone this until a future version of the specification.

James Robinson, 8 Feb 2012, 23:49:17

Fixed in 458:4843fb42912f

James Robinson, 10 May 2012, 21:45:08

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Yoav Weiss <yoavweiss@google.com>, Ilya Grigorik <igrigorik@google.com>, Chairs, Xiaoqian Wu <xiaoqian@w3.org>, Staff Contact
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