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/*
* 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 "config.h"
#include "core/css/resolver/StyleResolverStats.h"
#include "wtf/text/CString.h"
#include "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;
sharedStyleRejectedByUncommonAttributeRules = 0;
sharedStyleRejectedBySiblingRules = 0;
sharedStyleRejectedByParent = 0;
matchedPropertyApply = 0;
matchedPropertyCacheHit = 0;
matchedPropertyCacheInheritedHit = 0;
matchedPropertyCacheAdded = 0;
}
String StyleResolverStats::report() const
{
StringBuilder output;
unsigned sharedStylesRejected = sharedStyleRejectedByUncommonAttributeRules + sharedStyleRejectedBySiblingRules + sharedStyleRejectedByParent;
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 uncommon attribute rules, %.2f%% by sibling rules and %.2f%% by parents disabling sharing.\n",
sharedStylesRejected,
PERCENT(sharedStylesRejected, sharedStyleFound),
PERCENT(sharedStyleRejectedByUncommonAttributeRules, sharedStylesRejected),
PERCENT(sharedStyleRejectedBySiblingRules, sharedStylesRejected),
PERCENT(sharedStyleRejectedByParent, 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
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