When: About the past week What: All window scrolling, entering text, manipulating objects is extremely slow (noticeable delay) in Google Docs, Spreadsheet, Presentations and Gmail. This is both in new/fresh documents and larger ones for all docs. It's for scrolling, entering text, deleting email. This is with a small number of tabs open (or lots of tabs). Also, I'm seeing the "spinner" when I switch tabs.

So, this is a regression? If so, regression range please? Have you restarted the browser? (just wondering if there is a leak) Do you have addons? Have you tried with a fresh profile? ...the usual checks.

Sorry I knew I forgot something. I did a "Refresh" 2 days ago, with no change. No addons. Regression range: Can you explain a bit more what info I should give you? Timeframe? I started noticing this last week, but it got really unusable this week. Is there a way to look at dates when the browser updated?

Which version of FF are you using? There is a tool for hunting regressions http://mozilla.github.io/mozregression/ But even without that, if you could roughly say which build is the first showing the issue. about:buildconfig Also in the "About Nightly" or "About Firefox" or so, it should tell the date, something like 52.0a1 (2016-11-09) (64-bit)

51.0a2 (2016-11-09) (32-bit) Here's the about:buildconfig page: Source Built from https://hg.mozilla.org/releases/mozilla-aurora/rev/ae3b6bfb810476141647ad681b796ed118062412 Build platform target i686-pc-mingw32 Build tools Compiler Version Compiler flags c:/builds/moz2_slave/m-aurora-w32-ntly-000000000000/build/src/vs2015u3/VC/bin/amd64_x86/cl.EXE 19.00.24213 -TC -nologo -wd4091 -D_HAS_EXCEPTIONS=0 -W3 -Gy -Zc:inline -arch:SSE2 -FS -wd4244 -wd4267 -wd4819 -we4553 c:/builds/moz2_slave/m-aurora-w32-ntly-000000000000/build/src/vs2015u3/VC/bin/amd64_x86/cl.EXE 19.00.24213 -TP -nologo -wd5026 -wd5027 -Zc:sizedDealloc- -Zc:threadSafeInit- -wd4091 -wd4577 -D_HAS_EXCEPTIONS=0 -W3 -Gy -Zc:inline -arch:SSE2 -FS -wd4251 -wd4244 -wd4267 -wd4345 -wd4351 -wd4800 -wd4819 -wd4595 -we4553 -GR- -Zi -GL -wd4624 -wd4952 -O1 -Oi -Oy Configure options MOZ_AUTOMATION=1 'MOZILLABUILD=C:\mozilla-build' --enable-update-channel=aurora --enable-js-shell --enable-eme=+adobe --with-mozilla-api-keyfile=/c/builds/mozilla-desktop-geoloc-api.key --with-google-api-keyfile=/c/builds/gapi.data MOZ_PGO=1 WINDOWSSDKDIR=c:/builds/moz2_slave/m-aurora-w32-ntly-000000000000/build/src/vs2015u3/SDK --enable-rust RUSTC=c:/builds/moz2_slave/m-aurora-w32-ntly-000000000000/build/src/rustc/bin/rustc CARGO=c:/builds/moz2_slave/m-aurora-w32-ntly-000000000000/build/src/cargo/bin/cargo --enable-jemalloc MAKE=c:/builds/moz2_slave/m-aurora-w32-ntly-000000000000/build/src/mozmake.EXE --enable-crashreporter --enable-release --enable-require-all-d3dc-versions --enable-verify-mar --with-branding=browser/branding/aurora

Is that the first build showing bad performance? Older builds are faster?

For sure it was good a few builds ago (not sure the exact one). But this one and the last one were bad performance, with the current one the worst.

Well, could you look for the last good build? Since sounds like this is a regression, and for regressions we need regression range.

Mike, wondering if this bug is interesting (from a spinner perspective).

Hey groter - can you please post the text content from about:support in here? That'll give us some more clues about what we might be dealing with here.

Sorry about the delay. Here ya go ... Google apps still more or less unusable. Application Basics ------------------ Name: Firefox Version: 52.0a2 Build ID: 20170123004004 Update Channel: aurora User Agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:52.0) Gecko/20100101 Firefox/52.0 OS: Windows_NT 10.0 Multiprocess Windows: 2/2 (Enabled by default) Safe Mode: false Crash Reports for the Last 3 Days --------------------------------- All Crash Reports Extensions ---------- Name: Activity Stream Version: 1.2.0 Enabled: true ID: @activity-streams Name: Application Update Service Helper Version: 1.0 Enabled: true ID: aushelper@mozilla.org Name: colorPicker Version: 3.0.1-signed.1-signed Enabled: true ID: colorPicker@colorPicker Name: FlyWeb Version: 1.0.0 Enabled: true ID: flyweb@mozilla.org Name: Form Autofill Version: 1.0 Enabled: true ID: formautofill@mozilla.org Name: Min Vid Version: 0.3.4 Enabled: true ID: @min-vid Name: Multi-process staged rollout Version: 1.7 Enabled: true ID: e10srollout@mozilla.org Name: Nimbus Screen Capture - editable screenshots. Version: 9.1.1 Enabled: true ID: nimbusscreencaptureff@everhelper.me Name: Pocket Version: 1.0.5 Enabled: true ID: firefox@getpocket.com Name: Test Pilot Version: 0.9.3-dev-837c6a0 Enabled: true ID: @testpilot-addon Name: Video DownloadHelper Version: 6.2.0 Enabled: true ID: {b9db16a4-6edc-47ec-a1f4-b86292ed211d} Name: Web Compat Version: 1.0 Enabled: true ID: webcompat@mozilla.org Name: Cliqz Version: 2.12.0 Enabled: false ID: cliqz@cliqz.com Name: Lightbeam Version: 1.3.1 Enabled: false ID: jid1-F9UJ2thwoAm5gQ@jetpack Name: MFAC Extension Version: 1.3.2.3008 Enabled: false ID: FIDOaddon@noknok.com Name: Profilist Version: 1.2.1-signed Enabled: false ID: Profilist@jetpack Graphics -------- Features Compositing: Direct3D 11 Asynchronous Pan/Zoom: wheel input enabled; touch input enabled WebGL Renderer: Google Inc. -- ANGLE (Intel(R) HD Graphics 5500 Direct3D11 vs_5_0 ps_5_0) WebGL2 Renderer: Google Inc. -- ANGLE (Intel(R) HD Graphics 5500 Direct3D11 vs_5_0 ps_5_0) Hardware H264 Decoding: Yes; Using D3D11 API Audio Backend: wasapi Direct2D: true DirectWrite: true (10.0.14393.351) GPU #1 Active: Yes Description: Intel(R) HD Graphics 5500 Vendor ID: 0x8086 Device ID: 0x1616 Driver Version: 20.19.15.4531 Driver Date: 9-29-2016 Drivers: igdumdim64 igd10iumd64 igd10iumd64 igd12umd64 igdumdim32 igd10iumd32 igd10iumd32 igd12umd32 Subsys ID: 222717aa RAM: Unknown Diagnostics AzureCanvasAccelerated: 0 AzureCanvasBackend: direct2d 1.1 AzureContentBackend: direct2d 1.1 AzureFallbackCanvasBackend: cairo Decision Log D3D9_COMPOSITING: disabled by default: Disabled by default Important Modified Preferences ------------------------------ accessibility.typeaheadfind.flashBar: 0 browser.cache.disk.capacity: 358400 browser.cache.disk.filesystem_reported: 1 browser.cache.disk.hashstats_reported: 1 browser.cache.disk.smart_size.first_run: false browser.cache.disk.smart_size.use_old_max: false browser.cache.frecency_experiment: 3 browser.download.importedFromSqlite: true 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Important Locked Preferences ---------------------------- Places Database --------------- JavaScript ---------- Incremental GC: true Accessibility ------------- Activated: false Prevent Accessibility: 0 Library Versions ---------------- NSPR Expected minimum version: 4.13.1 Version in use: 4.13.1 NSS Expected minimum version: 3.28.1 Version in use: 3.28.1 NSSSMIME Expected minimum version: 3.28.1 Version in use: 3.28.1 NSSSSL Expected minimum version: 3.28.1 Version in use: 3.28.1 NSSUTIL Expected minimum version: 3.28.1 Version in use: 3.28.1 Experimental Features --------------------- Sandbox ------- Content Process Sandbox Level: 1

Are you in Berlin office? If so perhaps ttaubert or someone could try to profile a bit where the issue is. (or you could use https://developer.mozilla.org/en-US/docs/Mozilla/Performance/Profiling_with_the_Built-in_Profiler )

:ttaubert — have you been able to connect with :groter? It would be super helpful to further profile the specific issue and provide more info for the team to move this along.

Just talked to George and we'll try to sit down tomorrow and get a profile. I'll leave the ni? to remind me.

Sorry, that took a while, but here are three profiles: [1] https://cleopatra.io/#report=e1c0be0bc04890f4cd343339e39be4660d22b2f6 [2] https://cleopatra.io/#report=54786d5e45b4a90650f3ded2b2532f9307a98ed4 [3] https://cleopatra.io/#report=8574de95842dbf5ced2d1cda105480392492f139 In the first two I opened Google Slides, and loaded a slide show. Then switched between slides a little. In the third I had an open slide show, switched between slides, added a new slide, removed it again.

Hmm, that is the old version of profiler, right? Any chance to install new one? And which version of FF?

53.0a2 (2017-02-06) (64-bit) Do you have a link to the new version of the profiler?

https://developer.mozilla.org/en-US/docs/Mozilla/Performance/Profiling_with_the_Built-in_Profiler has the link

And could you possibly try Nightly.

But as expected, mostly JS, also some painting.

Still on Aurora for this one: Looked at email, opened a Google Presentation, scrolled a bit: https://perf-html.io/public/3e6b1a1ede0a8343066745f50b872187270d0cdc/calltree/?thread=2 Added a slide, deleted a slide, then moved to a GDoc and scrolled a bit and added a comment: https://perfht.ml/2llg02h Will try with Nightly.

Nightly - 54.0a1 (2017-02-15) (64-bit) https://perfht.ml/2lbd7hU

George, any chance you can please share the presentation in that the profile in comment 21 is coming from? In case it's not a public document, sharing it privately via email also works fine. Thanks!

Sorry I missed this. I have no idea what document that was. Would you like me to rerun the tests on a new document? I can do that later today (on my mobile now so not possible immediately).

Not really, just please keep this in mind in case you encounter slowness issues with Google Docs in the future. We already have a lot of known slowness issues with Google Docs and it's extremely likely that the issue you're seeing is covered by one of those, but in case you encountered a doc in the future that happened to be particularly slow, please feel free to send it my way so I can have a look. Thank you!