ca72b2b796
Summary: Use const where possible. This does not use const for all variables as that would require too much refactoring for one diff. It does however use const where currently possible as well as does some small refactoring to enable const usage in more locations. Striving for 100% const usage leads to code with is easier to reason about as a reference will always reference the same value. The compiler will also assist if you accidentally override a reference. Reviewed By: IanChilds Differential Revision: D3741999 fbshipit-source-id: 1ba7da5784c3047f2d4c03746890192f724aa65e
81 lines
2.5 KiB
C
81 lines
2.5 KiB
C
/**
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* Copyright (c) 2014-present, Facebook, Inc.
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* All rights reserved.
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*
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* This source code is licensed under the BSD-style license found in the
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* LICENSE file in the root directory of this source tree. An additional grant
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* of patent rights can be found in the PATENTS file in the same directory.
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*/
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#include "CSSBenchmark.h"
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#include <CSSLayout/CSSLayout.h>
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#include <time.h>
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// Measure functions can be quite slow, for example when measuring text.
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// Simulate this by sleeping for 1 millisecond.
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static CSSSize _measure(const void *context,
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const float width,
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const CSSMeasureMode widthMode,
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const float height,
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const CSSMeasureMode heightMode) {
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const struct timespec sleeptime = {0, 1000000};
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nanosleep(&sleeptime, NULL);
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return (CSSSize){
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.width = widthMode == CSSMeasureModeUndefined ? 10 : width,
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.height = heightMode == CSSMeasureModeUndefined ? 10 : width,
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};
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}
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CSS_BENCHMARKS({
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CSS_BENCHMARK("Stack with flex", {
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const CSSNodeRef root = CSSNodeNew();
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CSSNodeStyleSetWidth(root, 100);
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CSSNodeStyleSetHeight(root, 100);
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for (uint32_t i = 0; i < 10; i++) {
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const CSSNodeRef child = CSSNodeNew();
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CSSNodeSetMeasureFunc(child, _measure);
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CSSNodeStyleSetFlex(child, 1);
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CSSNodeInsertChild(root, child, 0);
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}
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CSSNodeCalculateLayout(root, CSSUndefined, CSSUndefined, CSSDirectionLTR);
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});
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CSS_BENCHMARK("Align stretch in undefined axis", {
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const CSSNodeRef root = CSSNodeNew();
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for (uint32_t i = 0; i < 10; i++) {
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const CSSNodeRef child = CSSNodeNew();
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CSSNodeStyleSetHeight(child, 20);
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CSSNodeSetMeasureFunc(child, _measure);
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CSSNodeInsertChild(root, child, 0);
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}
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CSSNodeCalculateLayout(root, CSSUndefined, CSSUndefined, CSSDirectionLTR);
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});
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CSS_BENCHMARK("Nested flex", {
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const CSSNodeRef root = CSSNodeNew();
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for (uint32_t i = 0; i < 10; i++) {
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const CSSNodeRef child = CSSNodeNew();
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CSSNodeSetMeasureFunc(child, _measure);
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CSSNodeStyleSetFlex(child, 1);
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CSSNodeInsertChild(root, child, 0);
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for (uint32_t ii = 0; ii < 10; ii++) {
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const CSSNodeRef grandChild = CSSNodeNew();
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CSSNodeSetMeasureFunc(grandChild, _measure);
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CSSNodeStyleSetFlex(grandChild, 1);
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CSSNodeInsertChild(child, grandChild, 0);
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}
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}
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CSSNodeCalculateLayout(root, CSSUndefined, CSSUndefined, CSSDirectionLTR);
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});
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});
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