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Perf: improve fastStringArrayJoin by 40%

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SukkaW
2024-10-12 12:49:15 +08:00
parent ae218f3356
commit a36d61e73c
1 changed files with 9 additions and 5 deletions
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14
Build/lib/misc.ts
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@@ -6,11 +6,15 @@ import { OUTPUT_CLASH_DIR, OUTPUT_SINGBOX_DIR, OUTPUT_SURGE_DIR } from '../const
export const isTruthy = <T>(i: T | 0 | '' | false | null | undefined): i is T => !!i; export const isTruthy = <T>(i: T | 0 | '' | false | null | undefined): i is T => !!i;
export function fastStringArrayJoin(arr: string[], sep: string) { export function fastStringArrayJoin(arr: string[], sep: string) {
let result = ''; const len = arr.length;
for (let i = 0, len = arr.length; i < len; i++) { if (len === 0) {
if (i !== 0) { return '';
result += sep; }
}
let result = arr[0];
for (let i = 1; i < len; i++) {
result += sep;
result += arr[i]; result += arr[i];
} }
return result; return result;