我需要一些帮助来发现一个小的浏览器/ WebWorker JavaScript中的内存泄漏。我在这段代码中找到了它：

/**
     * Resizes an Image
     *
     * @function scaleImage
     * @param {object}  oImageBlob  blob of image
     * @param {int}     iHeight     New height of Image
     * @return {ImageBitmap}    ImageBitmap Object
     */         
    async function scaleImage(oImageBlob, iHeight) {
        var img = await self.createImageBitmap(oImageBlob); 
        var iWidth = Math.round( ( img.width / img.height ) * iHeight); 
        var canvas = new OffscreenCanvas(iWidth,iHeight);
        var ctx = canvas.getContext('2d');  
        ctx.drawImage(img, 0, 0, canvas.width, canvas.height);      
        return(canvas.transferToImageBitmap());
    }

它的调用来自：

[inside a web worker: Some looping that calls this about 1200 times while parsind files from a s3 bucket ...]
         var oImageBlob = await new Response(oS3Object.Body, {}).blob();
         var oThumbnail = await scaleImage(oImageBlob, 100);
         await IDBputData(oInput.sFileKey, oImageBlob, oInput.sStore, oThumbnail)
    [... end of the loop]

另一个内部功能是

/**
     * Put information to IndexedDB 
     *
     * @function IDBputData 
     * @param {string}  sKey        key of information
     * @param {string}  sValue      information to upload
     * @param {string}  sStore      name of object store
     * @param {object}  oThumbnail  optrional, default: null, thumbnail image
     * @return {object}     - SUCCESS: array, IndexedDB Identifyer "key"
     *                      - FAIL: Error Message
     */     
    async function IDBputData(sKey, sValue, sStore, oThumbnail=null) {
        var oGeneratedKeys = {};
        if(sStore=="panelStore"){
            oGeneratedKeys = await getKeyfromSKey(sKey);
        }
        return new Promise((resolve, reject) => {
            const tx = oConn.transaction(sStore, 'readwrite');                  
            const store = tx.objectStore(sStore);
            var request = {}
            request = store.put({panelkey: oGeneratedKeys.panelkey, layerkey: oGeneratedKeys.layerkey, countrycode: oGeneratedKeys.countrycode, value: sValue, LastModified: new Date(), oThumbnail: oThumbnail});
            request.onsuccess = () => (oThumbnail.close(),resolve(request.result));
            request.onerror = () => (oThumbnail.close(),reject(request.error));
        });
    }

当我在Chrome中以这种方式运行它时，它会消耗掉我所有的空闲内存（大约8 GB），然后崩溃（笔记本电脑与CPU/GPU共享内存）。
当我改变

var oThumbnail = await scaleImage(oImageBlob, 100);

至

var oThumbnail = null;

Chrome的RAM消耗保持在800 MB左右，所以必须有一些最上面的函数“scaleImage”。
我试着调整它，但没有成功。

/**
 * Resizes an Image
 *
 * @function scaleImage
 * @param {object}  oImageBlob  blob of image
 * @param {int}     iHeight     New height of Image
 * @return {ImageBitmap}    ImageBitmap Object
 */         
async function scaleImage(oImageBlob, iHeight) {
    var img = await self.createImageBitmap(oImageBlob); 
    var iWidth = Math.round( ( img.width / img.height ) * iHeight); 
    var canvas = new OffscreenCanvas(iWidth,iHeight);
    var ctx = canvas.getContext('2d');  
    ctx.drawImage(img, 0, 0, canvas.width, canvas.height);      

    var oImageBitmap = canvas.transferToImageBitmap();

    ctx = null;
    canvas = null;
    iWidth = null;
    img = null;

    return(oImageBitmap);
}

任何帮助都是非常感谢的。