为了提高打包金手指的速度，进行了多线程优化，但是发现在cpu不多的情况下，其实比起单核并不会快很多（毕竟 需要进行序列化）

tools/cheat-builder/build.js

@@ -1,6 +1,7 @@
 const readCht = require("./cht");
 const fs = require("fs");
-const { readFile, writeFile, access } = require("fs/promises");
+const { readFile, writeFile } = require("fs/promises");
+const transform = require("./worker");
 
 const loadlist = async () => {
     const datfile = await readFile("./serial.json");
@@ -8,45 +9,6 @@ const loadlist = async () => {
     return Object.entries(datas).filter(n => n[1] != "????");
 }
 
-const trimcheat = (dat, info, order) => {
-    let parts = [], start = 0, done = false;
-    while (!done) {
-        let pos = dat.indexOf("[GameInfo]", start);
-        if (pos > 0) {
-            pos = dat.indexOf("[", pos + "[GameInfo]".length);
-            if (pos > 0) {
-                parts.push(dat.slice(start, pos));
-                start = pos;
-            }
-            else {
-                parts.push(dat.slice(start, dat.length));
-                done = true;
-            }
-        }
-        else {
-            parts.push(dat.slice(start, dat.length));
-            done = true;
-        }
-    }
-    return parts.map(tr => readCht(tr, info, order));
-}
-
-const loadcheat = async (order, serial, title, file) => {
-    try {
-        const chtfile = await readFile(file);
-        const cheats = chtfile.toString("utf-8");
-        let cheat = null;
-        if (cheats.indexOf("[GameInfo]") != cheats.lastIndexOf("[GameInfo]"))
-            cheat = trimcheat(cheats, { serial }, order);
-        else cheat = [readCht(cheats, { serial }, order)];
-        return { serial, cheat }
-    }
-    catch (e) {
-        console.log("bad cheat: %s[order=%d]\n%s", title, order, e.stack)
-        return { serial }
-    };
-}
-
 const format = valid => {
     valid.sort((a, b) => a.serial.localeCompare(b.serial));
     console.info(`valid rom has ${valid.length}`);
@@ -137,27 +99,11 @@ const format = valid => {
     return ret;
 }
 
-const hasfile = f => {
-    try {
-        fs.accessSync(f);
-        return true;
-    }
-    catch (e) {
-        console.error(e.stack)
-        return false;
-    }
-}
-
 const start = async () => {
+    let begin = Date.now();
     let list = await loadlist();
-    let roms = await Promise.all(list.map(game => {
+    let roms = await transform(list);
-        const [order, serial, title] = game;
+    console.log(`all rom has ${roms.length} and time ${Date.now() - begin}`);
-        const file = `./gba/${order}.u8`;
-        if (hasfile(file))
-            return loadcheat(order, serial, title ?? order, file);
-        else return Promise.resolve();
-    }));
-    console.log(`all rom has ${roms.length}`);
     roms = Object.entries(roms.reduce((r, data) => {
         if (!data) return r;
 

tools/cheat-builder/worker.js

@@ -0,0 +1,78 @@
+const {Worker, isMainThread, parentPort, workerData} = require("worker_threads");
+const readCht = require("./cht");
+const { readFile, access } = require("fs/promises");
+const ncpu = require("os").availableParallelism();
+
+const trimcheat = (dat, info, order) => {
+    let parts = [], start = 0, done = false;
+    while (!done) {
+        let pos = dat.indexOf("[GameInfo]", start);
+        if (pos > 0) {
+            pos = dat.indexOf("[", pos + "[GameInfo]".length);
+            if (pos > 0) {
+                parts.push(dat.slice(start, pos));
+                start = pos;
+            }
+            else {
+                parts.push(dat.slice(start, dat.length));
+                done = true;
+            }
+        }
+        else {
+            parts.push(dat.slice(start, dat.length));
+            done = true;
+        }
+    }
+    return parts.map(tr => readCht(tr, info, order));
+}
+
+const loadcheat = async (order, serial, title, file) => {
+    if( false == await access(file).catch( e => false ) ) {
+        return Promise.resolve();
+    }
+
+    try {
+        const chtfile = await readFile(file);
+        const cheats = chtfile.toString("utf-8");
+        let cheat = null;
+        if (cheats.indexOf("[GameInfo]") != cheats.lastIndexOf("[GameInfo]"))
+            cheat = trimcheat(cheats, { serial }, order);
+        else cheat = [readCht(cheats, { serial }, order)];
+        return { serial, cheat }
+    }
+    catch (e) {
+        console.log("bad cheat: %s[order=%d]\n%s", title, order, e.stack)
+        return { serial }
+    };
+}
+
+if( isMainThread ) {
+    module.exports = ncpu > 3 ? function(list) {
+        const nPerThread = Math.ceil(list.length / ncpu);
+        const results = new Array(ncpu);
+        let n = 0;
+        return new Promise( ok => {
+            const workers = new Array(ncpu).fill(0).map( (_,i) => {
+                const sublist = list.slice(i * nPerThread, (i+1) * nPerThread);
+                const worker = new Worker(__filename, { workerData: sublist });
+                worker.once("message", msg => {
+                    results[i] = msg;
+                    worker.unref();
+                    if( ++n == ncpu ) ok(results.flat());
+                });
+            } );
+        });
+    } : list => Promise.all( list.map( game => {
+        const [order, serial, title] = game;
+        const file = `./gba/${order}.u8`;
+        return loadcheat(order, serial, title ?? order, file);
+    } ) );
+}
+else {
+    const list = workerData;
+    Promise.all( list.map( game => {
+        const [order, serial, title] = game;
+        const file = `./gba/${order}.u8`;
+        return loadcheat(order, serial, title ?? order, file);
+    } ) ).then( res => parentPort.postMessage(res) );
+}