| /* |
| * Copyright (C) 2013 Google Inc. All rights reserved. |
| * |
| * Redistribution and use in source and binary forms, with or without |
| * modification, are permitted provided that the following conditions are |
| * met: |
| * |
| * * Redistributions of source code must retain the above copyright |
| * notice, this list of conditions and the following disclaimer. |
| * * Redistributions in binary form must reproduce the above |
| * copyright notice, this list of conditions and the following disclaimer |
| * in the documentation and/or other materials provided with the |
| * distribution. |
| * * Neither the name of Google Inc. nor the names of its |
| * contributors may be used to endorse or promote products derived from |
| * this software without specific prior written permission. |
| * |
| * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS |
| * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT |
| * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR |
| * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT |
| * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, |
| * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT |
| * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, |
| * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY |
| * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT |
| * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE |
| * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
| */ |
| |
| #include "sky/engine/core/css/resolver/StyleResolverStats.h" |
| |
| #include "sky/engine/wtf/text/CString.h" |
| #include "sky/engine/wtf/text/StringBuilder.h" |
| |
| #define PERCENT(x, y) ((!y) ? 0 : (((x) * 100.0) / (y))) |
| |
| namespace blink { |
| |
| void StyleResolverStats::reset() |
| { |
| sharedStyleLookups = 0; |
| sharedStyleCandidates = 0; |
| sharedStyleFound = 0; |
| sharedStyleMissed = 0; |
| sharedStyleRejectedByAttributeRules = 0; |
| matchedPropertyApply = 0; |
| matchedPropertyCacheHit = 0; |
| matchedPropertyCacheInheritedHit = 0; |
| matchedPropertyCacheAdded = 0; |
| } |
| |
| String StyleResolverStats::report() const |
| { |
| StringBuilder output; |
| |
| unsigned sharedStylesRejected = sharedStyleRejectedByAttributeRules; |
| unsigned sharedStylesUsed = sharedStyleFound - sharedStylesRejected; |
| |
| output.appendLiteral("Style sharing:\n"); |
| output.append(String::format(" %u elements were added to the sharing candidate list.\n", sharedStyleCandidates)); |
| output.append(String::format(" %u calls were made to findSharedStyle, %u found a candidate to share with (%.2f%%).\n", sharedStyleLookups, sharedStyleFound, PERCENT(sharedStyleFound, sharedStyleLookups))); |
| if (printMissedCandidateCount) |
| output.append(String::format(" %u candidates could have matched but were not in the list when searching (%.2f%%).\n", sharedStyleMissed, PERCENT(sharedStyleMissed, sharedStyleLookups))); |
| output.append(String::format(" %u of found styles were rejected (%.2f%%), %.2f%% by attribute rules.\n", |
| sharedStylesRejected, |
| PERCENT(sharedStylesRejected, sharedStyleFound), |
| PERCENT(sharedStyleRejectedByAttributeRules, sharedStylesRejected))); |
| output.append(String::format(" %u of found styles were used for sharing (%.2f%%).\n", sharedStylesUsed, PERCENT(sharedStylesUsed, sharedStyleFound))); |
| output.append(String::format(" %.2f%% of calls to findSharedStyle returned a shared style.\n", PERCENT(sharedStylesUsed, sharedStyleLookups))); |
| |
| output.append('\n'); |
| |
| output.appendLiteral("Matched property cache:\n"); |
| output.append(String::format(" %u calls to applyMatchedProperties, %u hit the cache (%.2f%%).\n", matchedPropertyApply, matchedPropertyCacheHit, PERCENT(matchedPropertyCacheHit, matchedPropertyApply))); |
| output.append(String::format(" %u cache hits also shared the inherited style (%.2f%%).\n", matchedPropertyCacheInheritedHit, PERCENT(matchedPropertyCacheInheritedHit, matchedPropertyCacheHit))); |
| output.append(String::format(" %u styles created in applyMatchedProperties were added to the cache (%.2f%%).\n", matchedPropertyCacheAdded, PERCENT(matchedPropertyCacheAdded, matchedPropertyApply))); |
| |
| return output.toString(); |
| } |
| |
| } // namespace blink |