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chore(gsub-subset): 清理 profiling 残留的 __sp 插桩

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上一轮 opt317 提交时误带入了 format1/format3 序列化路径上的 __sp 计时
插桩（globalThis 属性读取 + performance.now 调用）。热路径每个 type6
subtable 都执行，属无关生产代码。删除并移除无用的 perf_hooks import。

GSUB 字节输出零变化（cmp 一致），性能持平。

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
This commit is contained in:
崮生（子虚） 2026-07-24 10:02:46 +08:00
parent 4c9022adb6
commit 1da81eb0c0
1 changed files with 2 additions and 8 deletions
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10
backend/font_util/gsub-subset.ts
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@ -22,7 +22,6 @@
*/
import { OTWriter as Writer, OTReader as Reader, serializeScriptList, serializeFeatureList } from "./ot-bytes.js";
import { performance } from "perf_hooks";
/** GSUB lookup 类型常量 */
const LT_SINGLE = 1;
@ -579,7 +578,6 @@ function serializeLigatureSubst(
function readClassDefMap(r: Reader, off: number, origToNew: Map<number, number>): Map<number, number> {
const result = new Map<number, number>();
if (off === 0) return result;
const __f10 = (globalThis).__sp?performance.now():0;
const format = r.u16(off);
if (format === 1) {
const startGid = r.u16(off + 2);
@ -649,7 +647,6 @@ function serializeChainedContextSubst(
covCache: CoverageCache,
gidLookup: GidLookup,
): boolean {
const __f10 = (globalThis).__sp?performance.now():0;
const format = r.u16(off);
if (format === 1) {
/** coverage(gid) + 子规则数组，每规则含 backtrack/input/lookahead gid 序列 + SubstLookupRecord */
@ -676,11 +673,10 @@ function serializeChainedContextSubst(
}
if (validRules.length > 0) entries.push({ firstGid: firstNew, rules: validRules });
}
if (entries.length === 0) { if((globalThis).__sp){const G=globalThis as any; G.__f1_fail_t=(G.__f1_fail_t||0)+performance.now()-__f10; G.__f1_fail_c=(G.__f1_fail_c||0)+1;} return false; }
if (entries.length === 0) return false;
/** 按 firstGid 升序排序，使 coverage（emitCoverage 强制升序）与 SubRuleSet 数组保持下标配对 */
entries.sort((a, b) => a.firstGid - b.firstGid);
writeChainFormat1(w, entries);
if((globalThis).__sp){const G=globalThis as any; G.__f1_ok_t=(G.__f1_ok_t||0)+performance.now()-__f10; G.__f1_ok_c=(G.__f1_ok_c||0)+1;}
return true;
}
@ -737,12 +733,10 @@ function serializeChainedContextSubst(
}
if (format === 3) {
const __f30 = (globalThis).__sp?performance.now():0;
/** 显式 coverage 数组 + SubstLookupRecord */
const parsed = parseChainFormat3(r, off, covCache, gidLookup);
if (!parsed) { if((globalThis).__sp){const G=globalThis as any; G.__f3_fail_t=(G.__f3_fail_t||0)+performance.now()-__f30; G.__f3_fail_c=(G.__f3_fail_c||0)+1;} return false; }
if (!parsed) return false;
writeChainFormat3(w, parsed);
if((globalThis).__sp){const G=globalThis as any; G.__f3_ok_t=(G.__f3_ok_t||0)+performance.now()-__f30; G.__f3_ok_c=(G.__f3_ok_c||0)+1;}
return true;
}