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perf: reduce if statement call on " and \ (micro-optimization) #695

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merged 1 commit into from
Mar 18, 2024
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perf: reduce if statement call on " and \ (micro-optimization) #695

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7 changes: 3 additions & 4 deletions lib/serializer.js
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Original file line number Diff line number Diff line change
Expand Up @@ -128,17 +128,16 @@ module.exports = class Serializer {
// eslint-disable-next-line
for (var i = 0; i < len; i++) {
point = str.charCodeAt(i)
if (point < 32 || (point >= 0xD800 && point <= 0xDFFF)) {
// The current character is non-printable characters or a surrogate.
return JSON.stringify(str)
}
if (
point === 0x22 || // '"'
point === 0x5c // '\'
) {
last === -1 && (last = 0)
result += str.slice(last, i) + '\\'
last = i
} else if (point < 32 || (point >= 0xD800 && point <= 0xDFFF)) {
// The current character is non-printable characters or a surrogate.
return JSON.stringify(str)
}
}

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