Benchmark: endsWith vs at vs trimEnd vs Regex

HTML Preparation code:

<!--your preparation HTML code goes here-->

Script Preparation code:

function generateRandomText(length) {
  const chars = 'ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789 ';
  let result = '';
  for (let i = 0; i < length; i++) {
    const randomIndex = Math.floor(Math.random() * chars.length);
    result += chars[randomIndex];
  }
  return result;
}

const test = new Array(1000).map(e => generateRandomText(100))

Tests:

endsWith
test.filter(t => t.endsWith(" ") || t.endsWith("\n") || t.endsWith("\t") || t.endsWith("\r") || t.endsWith("\f") || t.endsWith("\v"))
at
test.filter(t =>{const l = t.at(t.length - 1); return l === " " || l === "\n" || l === "\t"|| l === "\r" || l === "\f" || l === "\v" })
regex
test.filter(t => /\s$/.test(t))
trimEnd
test.filter(t => (t.trimEnd().length !== t.length))

Historical Performance Data aggregated from 7 community runs

Desktop Results:

Chrome 7 runs

regex

788K/s

trimEnd

788K/s

785K/s

endsWith

772K/s

View exact numbers

✓ regex: 788,054 ops/sec
• trimEnd: 787,687 ops/sec
• at: 784,934 ops/sec
• endsWith: 771,993 ops/sec

Results show median performance across all community submissions. Run this benchmark yourself to verify on your device.

Rendered benchmark preparation results:

Suite status: <idle, ready to run>

Previous results

Test case name	Result
endsWith
at
regex
trimEnd

Fastest: N/A

Slowest: N/A

Latest run results:

Run details: (Test run date: one year ago)

User agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/136.0.0.0 Safari/537.36

Browser/OS: Chrome 136 on Windows

View result in a separate tab

regex

790K/s

trimEnd

782K/s

763K/s

endsWith

736K/s

View exact numbers

Test name	Executions per second
✓ regex	790,078 Ops/sec
trimEnd	782,026 Ops/sec
at	762,689 Ops/sec
endsWith	735,815 Ops/sec

endsWith vs at vs trimEnd vs Regex (version: 1)

Comparing performance of: `endsWith vs at vs regex vs trimEnd`

Created: one year ago by: Guest

Go to the latest result

endsWith

at

regex

trimEnd

Historical Performance Data aggregated from 7 community runs

Desktop Results:

Chrome 7 runs

Suite status: <idle, ready to run>

Fastest: N/A

Slowest: N/A

endsWith vs at vs trimEnd vs Regex (version: 1)

Comparing performance of: endsWith vs at vs regex vs trimEnd

Created: one year ago by: Guest

Go to the latest result

endsWith

at

regex

trimEnd

Historical Performance Data aggregated from 7 community runs

Desktop Results:

Chrome 7 runs

Suite status: <idle, ready to run>

Fastest: N/A

Slowest: N/A

Related benchmarks

Comparing performance of: `endsWith vs at vs regex vs trimEnd`