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| 1 /* |
| 2 * Copyright (C) 2013 Google Inc. All rights reserved. |
| 3 * |
| 4 * Redistribution and use in source and binary forms, with or without |
| 5 * modification, are permitted provided that the following conditions are |
| 6 * met: |
| 7 * |
| 8 * * Redistributions of source code must retain the above copyright |
| 9 * notice, this list of conditions and the following disclaimer. |
| 10 * * Redistributions in binary form must reproduce the above |
| 11 * copyright notice, this list of conditions and the following disclaimer |
| 12 * in the documentation and/or other materials provided with the |
| 13 * distribution. |
| 14 * * Neither the name of Google Inc. nor the names of its |
| 15 * contributors may be used to endorse or promote products derived from |
| 16 * this software without specific prior written permission. |
| 17 * |
| 18 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS |
| 19 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT |
| 20 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR |
| 21 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT |
| 22 * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, |
| 23 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT |
| 24 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, |
| 25 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY |
| 26 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT |
| 27 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE |
| 28 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
| 29 */ |
| 30 |
| 31 #include "config.h" |
| 32 #include "core/css/resolver/StyleResolverStats.h" |
| 33 |
| 34 #include "wtf/text/CString.h" |
| 35 #include "wtf/text/StringBuilder.h" |
| 36 |
| 37 #define PERCENT(x, y) ((!y) ? 0 : (((x) * 100.0) / (y))) |
| 38 |
| 39 namespace WebCore { |
| 40 |
| 41 void StyleResolverStats::reset() |
| 42 { |
| 43 sharedStyleLookups = 0; |
| 44 sharedStyleCandidates = 0; |
| 45 sharedStyleFound = 0; |
| 46 sharedStyleMissed = 0; |
| 47 sharedStyleRejectedByUncommonAttributeRules = 0; |
| 48 sharedStyleRejectedBySiblingRules = 0; |
| 49 sharedStyleRejectedByParent = 0; |
| 50 matchedPropertyApply = 0; |
| 51 matchedPropertyCacheHit = 0; |
| 52 matchedPropertyCacheInheritedHit = 0; |
| 53 matchedPropertyCacheAdded = 0; |
| 54 } |
| 55 |
| 56 String StyleResolverStats::report() const |
| 57 { |
| 58 StringBuilder output; |
| 59 |
| 60 unsigned sharedStylesRejected = sharedStyleRejectedByUncommonAttributeRules
+ sharedStyleRejectedBySiblingRules + sharedStyleRejectedByParent; |
| 61 unsigned sharedStylesUsed = sharedStyleFound - sharedStylesRejected; |
| 62 |
| 63 output.append("Style sharing:\n"); |
| 64 output.append(String::format(" %u elements were added to the sharing candid
ate list.\n", sharedStyleCandidates)); |
| 65 output.append(String::format(" %u calls were made to findSharedStyle, %u fo
und a candidate to share with (%.2f%%).\n", sharedStyleLookups, sharedStyleFound
, PERCENT(sharedStyleFound, sharedStyleLookups))); |
| 66 if (printMissedCandidateCount) |
| 67 output.append(String::format(" %u candidates could have matched but wer
e not in the list when searching (%.2f%%).\n", sharedStyleMissed, PERCENT(shared
StyleMissed, sharedStyleLookups))); |
| 68 output.append(String::format(" %u of found styles were rejected (%.2f%%), %
.2f%% by uncommon attribute rules, %.2f%% by sibling rules and %.2f%% by parents
disabling sharing.\n", |
| 69 sharedStylesRejected, |
| 70 PERCENT(sharedStylesRejected, sharedStyleFound), |
| 71 PERCENT(sharedStyleRejectedByUncommonAttributeRules, sharedStylesRejecte
d), |
| 72 PERCENT(sharedStyleRejectedBySiblingRules, sharedStylesRejected), |
| 73 PERCENT(sharedStyleRejectedByParent, sharedStylesRejected))); |
| 74 output.append(String::format(" %u of found styles were used for sharing (%.
2f%%).\n", sharedStylesUsed, PERCENT(sharedStylesUsed, sharedStyleFound))); |
| 75 output.append(String::format(" %.2f%% of calls to findSharedStyle returned
a shared style.\n", PERCENT(sharedStylesUsed, sharedStyleLookups))); |
| 76 |
| 77 output.append("\n"); |
| 78 |
| 79 output.append("Matched property cache:\n"); |
| 80 output.append(String::format(" %u calls to applyMatchedProperties, %u hit t
he cache (%.2f%%).\n", matchedPropertyApply, matchedPropertyCacheHit, PERCENT(ma
tchedPropertyCacheHit, matchedPropertyApply))); |
| 81 output.append(String::format(" %u cache hits also shared the inherited styl
e (%.2f%%).\n", matchedPropertyCacheInheritedHit, PERCENT(matchedPropertyCacheIn
heritedHit, matchedPropertyCacheHit))); |
| 82 output.append(String::format(" %u styles created in applyMatchedProperties
were added to the cache (%.2f%%).\n", matchedPropertyCacheAdded, PERCENT(matched
PropertyCacheAdded, matchedPropertyApply))); |
| 83 |
| 84 return output.toString(); |
| 85 } |
| 86 |
| 87 } // namespace WebCore |
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