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