API名称： wx.createWorker 开启useExperimentalWorker 手机信息： iphone13pro iOS 17.1.1 微信版本：8.0.44 基础库： 3.2.1 现象：在使用xr-frame时，获取了相机的yBuffer，uvBuffer后，传递到worker进行压缩，压缩完成后返回主线程发送请求。 在android真机上正常，在iOS真机上非常卡顿。将useExperimentalWorker关闭恢复正常。 // index function createNewWorker() { const worker = wx.createWorker('workers/index.js', { useExperimentalWorker: true }) return worker; } this.worker = createNewWorker(); // 监听worker被系统回收事件 this.worker.onProcessKilled(() => { // 重新创建一个worker this.worker = createNewWorker() }) const ArRawData = this.arSystem.getARRawData(); const uvBuffer = ArRawData.uvBuffer; const yBuffer = ArRawData.yBuffer; const width = ArRawData.width; const height = ArRawData.height; const scaleFactor = wx.getSystemInfoSync().pixelRatio; this.worker.postMessage({ type: 'yuv', data: { width, height, scaleFactor, yBuffer, uvBuffer, } }) // worker import { encode } from 'base64-arraybuffer/index'; function downscaleYUV(yData, uvData, originalWidth, originalHeight, scaleFactor) { const newWidth = Math.floor(originalWidth / scaleFactor); const newHeight = Math.floor(originalHeight / scaleFactor); const newYData = new Uint8Array(newWidth * newHeight); const newUVData = new Uint8Array(newWidth / 2 * newHeight / 2 * 2); for (let y = 0; y < newHeight; y++) { for (let x = 0; x < newWidth; x++) { const originalX = x * scaleFactor; const originalY = y * scaleFactor; const newYIndex = y * newWidth + x; const originalYIndex = originalY * originalWidth + originalX; newYData[newYIndex] = yData[originalYIndex]; // For UV channel const originalUVIndex = Math.floor(originalY / 2) * Math.floor(originalWidth / 2) + Math.floor(originalX / 2); const newUVIndex = Math.floor(y / 2) * Math.floor(newWidth / 2) + Math.floor(x / 2); newUVData[newUVIndex * 2] = uvData[originalUVIndex * 2]; newUVData[newUVIndex * 2 + 1] = uvData[originalUVIndex * 2 + 1]; } } return { newYData, newUVData, newWidth, newHeight }; } worker.onMessage(function (res) { switch(res.type) { case 'yuv': { const { width, height, yBuffer, uvBuffer, scaleFactor } = res.data; const { newYData, newUVData, newWidth, newHeight } = downscaleYUV( new Uint8Array(yBuffer), new Uint8Array(uvBuffer), width, height, scaleFactor ); worker.postMessage({ type: 'yuv_result', data: { scaleFactor, yBuffer: encode(newYData), uvBuffer: encode(newUVData), } }) } } })