Title: [215366] trunk
Revision
215366
Author
mmaxfi...@apple.com
Date
2017-04-14 10:57:26 -0700 (Fri, 14 Apr 2017)

Log Message

Add performance test for asking the platform for a font for U+2060 WORD JOINER
https://bugs.webkit.org/show_bug.cgi?id=170842

Reviewed by Tim Horton.

PerformanceTests:

* Layout/word-joiner.html: Added.

Source/WebCore:

No new tests because there is no behavior change.

* platform/graphics/WidthCache.h:
(WebCore::WidthCache::add):
(WebCore::WidthCache::addSlowCase):

Source/WTF:

* wtf/unicode/CharacterNames.h:

Modified Paths

Added Paths

Diff

Modified: trunk/PerformanceTests/ChangeLog (215365 => 215366)


--- trunk/PerformanceTests/ChangeLog	2017-04-14 17:43:42 UTC (rev 215365)
+++ trunk/PerformanceTests/ChangeLog	2017-04-14 17:57:26 UTC (rev 215366)
@@ -1,3 +1,12 @@
+2017-04-14  Myles C. Maxfield  <mmaxfi...@apple.com>
+
+        Add performance test for asking the platform for a font for U+2060 WORD JOINER
+        https://bugs.webkit.org/show_bug.cgi?id=170842
+
+        Reviewed by Tim Horton.
+
+        * Layout/word-joiner.html: Added.
+
 2017-04-03  Saam Barati  <sbar...@apple.com>
 
         Add a new test to ARES6

Added: trunk/PerformanceTests/Layout/word-joiner.html (0 => 215366)


--- trunk/PerformanceTests/Layout/word-joiner.html	                        (rev 0)
+++ trunk/PerformanceTests/Layout/word-joiner.html	2017-04-14 17:57:26 UTC (rev 215366)
@@ -0,0 +1,44 @@
+<!DOCTYPE html>
+<html>
+<head>
+<script src=""
+</head>
+</head>
+<body>
+    <pre id="log"></pre>
+    <div id="target" style="width: 300px; display: block; font-family: 'Zapfino';">
+    </div>
+    <script>
+        var target = document.getElementById("target");
+        var style = target.style;
+        var locales = ["ar", "hy", "as", "iu", "ab", "hi", "am", "ka", "el", "gu", "pa", "ko", "ko", "he", "kn", "ja", "km", "lo", "aa", "ml", "my", "or", "si", "ta", "te", "dv", "th", "bo", "zh_hk", "ii"];
+
+        for (var i = 0; i < locales.length; ++i) {
+            var span = document.createElement("span");
+            span.className = "tester";
+            var joiner = document.createTextNode(String.fromCharCode(0x2060));
+            span.appendChild(joiner);
+            target.appendChild(span);
+        }
+
+        function updateLanguages() {
+            if (window.internals)
+                internals.invalidateFontCache();
+            var testers = document.getElementsByClassName("tester");
+            for (var i = 0; i < testers.length; ++i) {
+                testers[i].lang = locales[i];
+            }
+        }
+        
+        updateLanguages();
+
+        function test() {
+            updateLanguages();
+            var testers = document.getElementsByClassName("tester");
+            testers[testers.length - 1].getClientRects();
+        }
+
+        PerfTestRunner.measureRunsPerSecond({ run: test });
+    </script>
+</body>
+</html>
\ No newline at end of file

Modified: trunk/Source/WTF/ChangeLog (215365 => 215366)


--- trunk/Source/WTF/ChangeLog	2017-04-14 17:43:42 UTC (rev 215365)
+++ trunk/Source/WTF/ChangeLog	2017-04-14 17:57:26 UTC (rev 215366)
@@ -1,3 +1,12 @@
+2017-04-14  Myles C. Maxfield  <mmaxfi...@apple.com>
+
+        Add performance test for asking the platform for a font for U+2060 WORD JOINER
+        https://bugs.webkit.org/show_bug.cgi?id=170842
+
+        Reviewed by Tim Horton.
+
+        * wtf/unicode/CharacterNames.h:
+
 2017-04-13  Yusuke Suzuki  <utatane....@gmail.com>
 
         [JSC] Date.parse should accept wider range of representation

Modified: trunk/Source/WTF/wtf/unicode/CharacterNames.h (215365 => 215366)


--- trunk/Source/WTF/wtf/unicode/CharacterNames.h	2017-04-14 17:43:42 UTC (rev 215365)
+++ trunk/Source/WTF/wtf/unicode/CharacterNames.h	2017-04-14 17:57:26 UTC (rev 215366)
@@ -92,6 +92,7 @@
 const UChar whiteCircle = 0x25CB;
 const UChar whiteSesameDot = 0xFE46;
 const UChar whiteUpPointingTriangle = 0x25B3;
+const UChar wordJoiner = 0x2060;
 const UChar yenSign = 0x00A5;
 const UChar zeroWidthJoiner = 0x200D;
 const UChar zeroWidthNoBreakSpace = 0xFEFF;
@@ -154,6 +155,7 @@
 using WTF::Unicode::whiteCircle;
 using WTF::Unicode::whiteSesameDot;
 using WTF::Unicode::whiteUpPointingTriangle;
+using WTF::Unicode::wordJoiner;
 using WTF::Unicode::yenSign;
 using WTF::Unicode::zeroWidthJoiner;
 using WTF::Unicode::zeroWidthNoBreakSpace;

Modified: trunk/Source/WebCore/ChangeLog (215365 => 215366)


--- trunk/Source/WebCore/ChangeLog	2017-04-14 17:43:42 UTC (rev 215365)
+++ trunk/Source/WebCore/ChangeLog	2017-04-14 17:57:26 UTC (rev 215366)
@@ -1,3 +1,16 @@
+2017-04-14  Myles C. Maxfield  <mmaxfi...@apple.com>
+
+        Add performance test for asking the platform for a font for U+2060 WORD JOINER
+        https://bugs.webkit.org/show_bug.cgi?id=170842
+
+        Reviewed by Tim Horton.
+
+        No new tests because there is no behavior change.
+
+        * platform/graphics/WidthCache.h:
+        (WebCore::WidthCache::add):
+        (WebCore::WidthCache::addSlowCase):
+
 2017-04-14  Ryan Haddad  <ryanhad...@apple.com>
 
         Unreviewed, rolling out r215350.

Modified: trunk/Source/WebCore/platform/graphics/WidthCache.h (215365 => 215366)


--- trunk/Source/WebCore/platform/graphics/WidthCache.h	2017-04-14 17:43:42 UTC (rev 215365)
+++ trunk/Source/WebCore/platform/graphics/WidthCache.h	2017-04-14 17:57:26 UTC (rev 215366)
@@ -140,22 +140,22 @@
             return nullptr;
         // The width cache is not really profitable unless we're doing expensive glyph transformations.
         if (!hasKerningOrLigatures)
-            return 0;
+            return nullptr;
         // Word spacing and letter spacing can change the width of a word.
         if (hasWordSpacingOrLetterSpacing)
-            return 0;
+            return nullptr;
         // Since this is just a width cache, we don't have enough information to satisfy glyph queries.
         if (glyphOverflow)
-            return 0;
+            return nullptr;
         // If we allow tabs and a tab occurs inside a word, the width of the word varies based on its position on the line.
         if (run.allowTabs())
-            return 0;
+            return nullptr;
         if (static_cast<unsigned>(run.length()) > SmallStringKey::capacity())
-            return 0;
+            return nullptr;
 
         if (m_countdown > 0) {
             --m_countdown;
-            return 0;
+            return nullptr;
         }
 
         return addSlowCase(run.text(), entry);
@@ -207,7 +207,7 @@
         // No need to be fancy: we're just trying to avoid pathological growth.
         m_singleCharMap.clear();
         m_map.clear();
-        return 0;
+        return nullptr;
     }
 
     typedef HashMap<SmallStringKey, float, SmallStringKeyHash, SmallStringKeyHashTraits> Map;
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