Parse vs precheck (v5)

Revision 5 of this benchmark created on

Setup

const patterns = [];
const patternsWithPre = [];
let logged = false;
function logOnce(value) {
  if (!logged) {
  	console.log(value);
  	logged = true;
  }
}

for (let i = 0; i < 1900; i++) {
	patterns.push("\"Comments"+i+"\"");
	patternsWithPre.push("\"Comments"+i+"\"");
}

for (let i = 0; i < 100; i++) {
	patterns.push("{\"*\":\"{number} comments\",\"_1\":\"1 comment"+i+"\"}");
}

for (let i = 0; i < 100; i++) {
	patternsWithPre.push("_j{\"*\":\"{number} comments\",\"_1\":\"1 comment"+i+"\"}");
}

Test runner

Ready to run.

Testing in
TestOps/sec
No check
const result = [];
patterns.forEach((pattern) => {
  try {
	result.push(JSON.parse(pattern));
  } catch {
    result.push(pattern);
  }
});
ready
Yes Check
const result = [];
patterns.forEach((pattern) => {
  if (typeof pattern === 'string' && (pattern[0] === '{' || pattern[0] === '[')) {
    try {
  	  result.push(JSON.parse(pattern));
    } catch {
      result.push(pattern);
    }
  } else {
  	result.push(pattern);
  }
});
ready
Pre
const result = [];
patternsWithPre.forEach((pattern) => {
  const pre = pattern.substring(0, 3);
  if (pre === '_j{' || pre === '_j[') {
  	const json = pattern.substring(2);
  	result.push(JSON.parse(json));
  } else {
  	result.push(pattern);
  }
});
ready

Revisions

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