Electrolysis/Release Criteria/UI Smoothness

Some UI smoothness metrics may regress, on Windows and Mac, up to 5%, if that gets wins elsewhere.

RASCI

• Responsible: mconley
• Accountable: RyanVM
• Supporting: jmaher, avih, gabor
• Consulted:
• Informed: cpeterson, elan, release management

Criteria

talos TART (tab animation smoothness)

• e10s comparison validated: mconley
• Current e10s diff: Possibly worse by ~6% on OS X with APZ disabled (see this analysis)
• bug 1251699 - Investigate potential e10s TART regression on OS X

talos tpaint (first paint of a new window opened from content)

• e10s comparison validated: jimm
• Current e10s diff: worse by 30-40% on all platforms, with APZ on or off.
• bug 1174770 - tpaint regressions (3%-33%) in e10s mode compared to non-e10s mode

Notes

• tpaint measures the time it takes to paint the content for a new window that has been opened from content. Windows can be opened from content in a few ways:
  • The content runs some JavaScript that calls window.open with non-default features, like window.open("https://www.mozilla.org", "_blank", "toolbars=no");
  • The user has flipped the browser.link.open_newwindow pref from its default to open new windows instead of new tabs, and then clicks on a target="_blank" anchor
• tpaint does not measure the time it takes to open a window triggered from the parent. Windows can be opened from the parent in a number of ways:
  • The user uses Ctrl-N or File > New Window to open a new window
  • The user clicks on a link in another application that opens the browser the first time
  • The user right clicks on a link in content, and chooses to Open Link in New Window
  • The user tears a tab out into a new window
• An experiment was conducted to determine whether or not e10s regresses opening windows from the parent.
  • The experiment was conducted in bug 1251732
  • The conclusion was that e10s does not regress this case.
• We suspect there is a second slow-path here that Talos is not measuring, and that's when the user clicks on a link that opens a new tab.
  • A bug has been filed to add such a test (bug 1253382)
• A bug has been filed to get Telemetry on how often we hit the ContentParent::RecvCreateWindow codepath, which we believe is the slow path. (bug 1253388)

talos tresize (window resize responsiveness)

• e10s comparison validated: jimm
• Current e10s diff: mixed
  • Windows 8 64: better by 12%
  • Windows 7/XP: worse by 7-12%
  • OS X: worse by 3%
  • Linux: worse by 1%
• bug 1179732 - 11-147% linux*/winxp tresize regression when comparing e10s to non e10s on the same build

talos tps (tab-switch speed)

• e10s comparison validated: jimm
• Current e10s diff (with APZ disabled - see this analysis)
  • Win 8: 19.66% worse
  • Win 7: 23.30% worse
  • OS X: 44.37% worse
  • Linux 64: 44.84% worse
• bug 1186585 - 28.2% to 48.5% tps talos regression with e10s enabled

talos CART (customization mode animation test)

• e10s comparison validated: mconley
• Current e10s diff (with APZ disabled - see this analysis)
  • Win 8: 2.0% worse
  • Win 7: 4.0% worse
  • OS X: 3.7% worse
  • Linux 64: 6.8% worse
• bug 1252768 - 2–7% e10s CART regression

Bugs

No results.

0 Total; 0 Open (0%); 0 Resolved (0%); 0 Verified (0%);