Benchmark: sa[;ol - MeasureThat.net

Tests:

panyang
x = 5 for (i=0; i < x; i++){ let line = '' for (j=1; j <=x+i; j++){ if (x - (i + 1) >= j) { line += '_' } else if (line[line.length - 1] == 'x'){ line += 'o' } else{ line += 'x' } } console.log(line) }
ponok
x = 5 for (i=0; i < x; i++){ console.log( '_'.repeat(x - (i + 1)) + Array.from( {length: i * 2 + 1}, (n, idx) => ['x', 'o'][idx % 2] ).join("") ) }

Rendered benchmark preparation results:

Previous results

Test case name	Result
panyang
ponok

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Latest run results:

Run details: (Test run date: 3 years ago)

User agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_2) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/88.0.4302.0 Safari/537.36

Browser/OS: Chrome 88 on Mac OS X 10.15.2

Test name	Executions per second
panyang	8266.5 Ops/sec
ponok	9743.5 Ops/sec

sa[;ol (version: 0)