133471 2014-06-03 02:30:58 -0700 Prepopulated tiles may never be unparented from TileGrids with aggressive tile retention on 2014-06-03 12:01:18 -0700 1 1 1 Unclassified WebKit Layout and Rendering 528+ (Nightly build) Unspecified Unspecified RESOLVED FIXED P2 Normal --- 1 thorton thorton commit-queue simon.fraser oldest_to_newest 1013069 0 thorton 2014-06-03 02:30:58 -0700 We only unparent tiles that are in the VisibleTileCohort when cleaning up no-longer-visible tiles. If tiles were created via prepopulateRect() and never made it into the VisibleTileCohort, they won't be unparented (and will thus stick around, nonvolatile, forever, until the scale changes or the primary coverage rect moves to intersect them). This is in some cases a huge waste of memory and time. We can't just immediately unparent all non-primary-coverage layers, because that would defeat prepopulateRect(). We may be able to make use of the cohort age and unparent them on a subsequent revalidateTiles (and schedule a revalidation timer when we prepopulate, etc.). 1013071 1 232419 thorton 2014-06-03 03:29:02 -0700 Created attachment 232419 patch 1013072 2 commit-queue 2014-06-03 03:30:50 -0700 Attachment 232419 did not pass style-queue: ERROR: Source/WebCore/platform/graphics/ca/mac/TileGrid.h:125: The parameter name "cohortInfo" adds no information, so it should be removed. [readability/parameter_name] [5] Total errors found: 1 in 4 files If any of these errors are false positives, please file a bug against check-webkit-style. 1013096 3 232419 simon.fraser 2014-06-03 09:03:44 -0700 Comment on attachment 232419 patch View in context: https://bugs.webkit.org/attachment.cgi?id=232419&action=review > Source/WebCore/platform/graphics/ca/mac/TileController.h:128 > + > + Blank lines. > Source/WebCore/platform/graphics/ca/mac/TileGrid.h:125 > + double timeUntilCohortExpires(TileCohortInfo cohortInfo); // move onto cohortinfo? const TileCohortInfo&. Could be static or moved onto TileCohortInfo. 1013124 4 thorton 2014-06-03 12:01:18 -0700 > > Source/WebCore/platform/graphics/ca/mac/TileGrid.h:125 > > + double timeUntilCohortExpires(TileCohortInfo cohortInfo); // move onto cohortinfo? > > const TileCohortInfo&. Could be static or moved onto TileCohortInfo. I totally meant to actually do what that comment said, and forgot. Fixed in the patch that landed. Thanks! http://trac.webkit.org/changeset/169565 232419 2014-06-03 03:29:02 -0700 2014-06-03 09:03:44 -0700 patch unparent.diff text/plain 7733 thorton ZGlmZiAtLWdpdCBhL1NvdXJjZS9XZWJDb3JlL0NoYW5nZUxvZyBiL1NvdXJjZS9XZWJDb3JlL0No YW5nZUxvZwppbmRleCA3NzRlNzY0Li5lNjE4Y2Q4IDEwMDY0NAotLS0gYS9Tb3VyY2UvV2ViQ29y ZS9DaGFuZ2VMb2cKKysrIGIvU291cmNlL1dlYkNvcmUvQ2hhbmdlTG9nCkBAIC0xLDMgKzEsMjQg QEAKKzIwMTQtMDYtMDMgIFRpbW90aHkgSG9ydG9uICA8dGltb3RoeV9ob3J0b25AYXBwbGUuY29t PgorCisgICAgICAgIFByZXBvcHVsYXRlZCB0aWxlcyBtYXkgbmV2ZXIgYmUgdW5wYXJlbnRlZCBm cm9tIFRpbGVHcmlkcyB3aXRoIGFnZ3Jlc3NpdmUgdGlsZSByZXRlbnRpb24gb24KKyAgICAgICAg aHR0cHM6Ly9idWdzLndlYmtpdC5vcmcvc2hvd19idWcuY2dpP2lkPTEzMzQ3MQorCisgICAgICAg IFJldmlld2VkIGJ5IE5PQk9EWSAoT09QUyEpLgorCisgICAgICAgICogcGxhdGZvcm0vZ3JhcGhp Y3MvY2EvbWFjL1RpbGVDb250cm9sbGVyLmg6CisgICAgICAgICogcGxhdGZvcm0vZ3JhcGhpY3Mv Y2EvbWFjL1RpbGVHcmlkLmg6CisgICAgICAgIChXZWJDb3JlOjpUaWxlR3JpZDo6VGlsZUNvaG9y dEluZm86OlRpbGVDb2hvcnRJbmZvKToKKyAgICAgICAgKiBwbGF0Zm9ybS9ncmFwaGljcy9jYS9t 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