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Run results for:
string includes vs startsWith vs startsWith with trimStart
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<iframe src="https://measurethat.net/Embed?id=614324" width="100%" height="500px"></iframe>
Run details:
User agent:
Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/138.0.0.0 Safari/537.36
Browser:
Chrome 138
Operating system:
Mac OS X 10.15.7
Device Platform:
Desktop
Date tested:
9 months ago
Test name
Executions per second
includes
161857856.0 Ops/sec
startsWith
72691920.0 Ops/sec
trimStart + startsWith
51559004.0 Ops/sec
HTML Preparation code:
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Script Preparation code:
/*your preparation JavaScript code goes here To execute async code during the script preparation, wrap it as function globalMeasureThatScriptPrepareFunction, example:*/ async function globalMeasureThatScriptPrepareFunction() { // This function is optional, feel free to remove it. // await someThing(); }
Tests:
includes
const str = `#EXTM3U #EXT-X-VERSION:6 #EXT-X-INDEPENDENT-SEGMENTS #EXT-X-STREAM-INF:BANDWIDTH=2250000,AVERAGE-BANDWIDTH=1628000,CODECS="avc1.64001e,mp4a.40.2",RESOLUTION=406x720,FRAME-RATE=30.000 audio-video/720/stream.m3u8 #EXT-X-STREAM-INF:BANDWIDTH=1500000,AVERAGE-BANDWIDTH=1128000,CODECS="avc1.640015,mp4a.40.2",RESOLUTION=270x480,FRAME-RATE=30.000 audio-video/480/stream.m3u8`; str.includes("#EXTM3U")
startsWith
const str = `#EXTM3U #EXT-X-VERSION:6 #EXT-X-INDEPENDENT-SEGMENTS #EXT-X-STREAM-INF:BANDWIDTH=2250000,AVERAGE-BANDWIDTH=1628000,CODECS="avc1.64001e,mp4a.40.2",RESOLUTION=406x720,FRAME-RATE=30.000 audio-video/720/stream.m3u8 #EXT-X-STREAM-INF:BANDWIDTH=1500000,AVERAGE-BANDWIDTH=1128000,CODECS="avc1.640015,mp4a.40.2",RESOLUTION=270x480,FRAME-RATE=30.000 audio-video/480/stream.m3u8`; str.startsWith("#EXTM3U")
trimStart + startsWith
const str = `#EXTM3U #EXT-X-VERSION:6 #EXT-X-INDEPENDENT-SEGMENTS #EXT-X-STREAM-INF:BANDWIDTH=2250000,AVERAGE-BANDWIDTH=1628000,CODECS="avc1.64001e,mp4a.40.2",RESOLUTION=406x720,FRAME-RATE=30.000 audio-video/720/stream.m3u8 #EXT-X-STREAM-INF:BANDWIDTH=1500000,AVERAGE-BANDWIDTH=1128000,CODECS="avc1.640015,mp4a.40.2",RESOLUTION=270x480,FRAME-RATE=30.000 audio-video/480/stream.m3u8`; str.trimStart().startsWith("#EXTM3U")