On Tue, 12 Nov 2019 16:52:54 GMT, Ajit Ghaisas <aghai...@openjdk.org> wrote:
> On Tue, 12 Nov 2019 16:45:04 GMT, Ajit Ghaisas <aghai...@openjdk.org> wrote: > >> **Issue :** >> https://bugs.openjdk.java.net/browse/JDK-8193445 >> >> **Background :** >> The CSS performance improvement done in >> [JDK-8151756](https://bugs.openjdk.java.net/browse/JDK-8151756) had to be >> backed out due to functional regressions reported in >> [JDK-8185709](https://bugs.openjdk.java.net/browse/JDK-8185709), >> [JDK-8183100](https://bugs.openjdk.java.net/browse/JDK-8183100) and >> [JDK-8168951](https://bugs.openjdk.java.net/browse/JDK-8168951). >> Refer to [JDK-8183100](https://bugs.openjdk.java.net/browse/JDK-8183100) for >> more details on this backout. >> >> **Description :** >> This PR reintroduces the CSS performance improvement fix done in >> [JDK-8151756](https://bugs.openjdk.java.net/browse/JDK-8151756) while >> addressing the functional regressions that were reported in >> [JDK-8185709](https://bugs.openjdk.java.net/browse/JDK-8185709), >> [JDK-8183100](https://bugs.openjdk.java.net/browse/JDK-8183100) and >> [JDK-8168951](https://bugs.openjdk.java.net/browse/JDK-8168951). >> For ease of review, I have made two separate commits - >> 1) [Commit >> 1](https://github.com/openjdk/jfx/pull/34/commits/d964675ebc2a42f2fd6928b773819502683f2334) >> - Reintroduces the CSS performance improvement fix done in >> [JDK-8151756](https://bugs.openjdk.java.net/browse/JDK-8151756) - most of >> the patch applied cleanly. >> 2) [Commit 2 >> ](https://github.com/openjdk/jfx/pull/34/commits/12ea8220a730ff8d98d520ce870691d54f0de00f)- >> fixes the functional regressions keeping performance improvement intact + >> adds a system test >> >> **Root Cause :** >> CSS performance improvement fix proposed in [JDK-8151756 >> ](https://bugs.openjdk.java.net/browse/JDK-8151756)correctly avoids the >> redundant CSS reapplication to children of a Parent. >> What was missed earlier in [JDK-8151756 >> ](https://bugs.openjdk.java.net/browse/JDK-8151756) fix : "CSS reapplication >> to the Parent itself”. >> This missing piece was the root cause of all functional regressions reported >> against [JDK-8151756](https://bugs.openjdk.java.net/browse/JDK-8151756) >> >> **Fix :** >> Fixed the identified root cause. See commit 2. >> >> **Testing :** >> 1. All passing unit tests continue to pass >> 2. New system test (based on >> [JDK-8209830](https://bugs.openjdk.java.net/browse/JDK-8209830)) added in >> this PR - fails before this fix and passes after the fix >> 3. System test JDK8183100Test continues to pass >> 4. All test cases attached to regressions >> [JDK-8185709](https://bugs.openjdk.java.net/browse/JDK-8185709), >> [JDK-8183100](https://bugs.openjdk.java.net/browse/JDK-8183100) and >> [JDK-8168951](https://bugs.openjdk.java.net/browse/JDK-8168951) pass with >> this fix >> >> In addition, testing by community with specific CSS performance / >> functionality will be helpful. >> >> ---------------- >> >> Commits: >> - 12ea8220: Fix for functional regressions of JDK-8151756 + add a sytem test >> - d964675e: Reintroduce JDK-8151756 CSS performance fix >> >> Changes: https://git.openjdk.java.net/jfx/pull/34/files >> Webrev: https://webrevs.openjdk.java.net/jfx/34/webrev.00 >> Issue: https://bugs.openjdk.java.net/browse/JDK-8193445 >> Stats: 121 lines in 5 files changed: 104 ins; 0 del; 17 mod >> Patch: https://git.openjdk.java.net/jfx/pull/34.diff >> Fetch: git fetch https://git.openjdk.java.net/jfx pull/34/head:pull/34 > > Reviewers: @kevinrushforth and @arapte It will be helpful if I can get some feedback from community with additional testing apart from what is mentioned in the description. PR: https://git.openjdk.java.net/jfx/pull/34
