[代码]function[代码] [代码]cleanAllFiles(path, newAssets, finish) {[代码][代码]    [代码][代码]fs.readdir({[代码][代码]        [代码][代码]dirPath: path,[代码][代码]        [代码][代码]success: [代码][代码]function[代码] [代码](res) {[代码][代码]            [代码][代码]var[代码] [代码]files = res.files;[代码][代码]            [代码][代码]([代码][代码]function[代码] [代码]next(idx) {[代码][代码]                [代码][代码]if[代码] [代码](idx < files.length) {[代码][代码]                    [代码][代码]var[代码] [代码]dirPath = path + [代码][代码]'/'[代码] [代码]+ files[idx];[代码][代码]                    [代码][代码]var[代码] [代码]stat = fs.statSync(dirPath);[代码][代码]                    [代码][代码]if[代码] [代码](stat.isDirectory()) {[代码][代码]                        [代码][代码]cleanAllFiles(dirPath, newAssets, [代码][代码]function[代码] [代码]() {[代码][代码]                            [代码][代码]next(idx + 1);[代码][代码]                        [代码][代码]});[代码][代码]                    [代码][代码]} [代码][代码]else[代码] [代码]{[代码][代码]                        [代码][代码]// remove old assets[代码][代码]                        [代码][代码]if[代码] [代码](newAssets && newAssets.indexOf(dirPath) !== -1) {[代码][代码]                            [代码][代码]next(idx + 1);[代码][代码]                            [代码][代码]return[代码][代码];[代码][代码]                        [代码][代码]}[代码][代码]                        [代码][代码]fs.unlink({[代码][代码]                            [代码][代码]filePath: dirPath,[代码][代码]                            [代码][代码]success: [代码][代码]function[代码] [代码]() {[代码][代码]                                [代码][代码]cc.log([代码][代码]'unlink local file '[代码] [代码]+ dirPath + [代码][代码]' successfully!'[代码][代码]);[代码][代码]                            [代码][代码]},[代码][代码]                            [代码][代码]fail: [代码][代码]function[代码] [代码](res) {[代码][代码]                                [代码][代码]cc.warn([代码][代码]'failed to unlink file('[代码] [代码]+ dirPath + [代码][代码]'): '[代码] [代码]+ res ? res.errMsg : [代码][代码]'unknown error'[代码][代码]);[代码][代码]                            [代码][代码]},[代码][代码]                            [代码][代码]complete: [代码][代码]function[代码] [代码]() {[代码][代码]                                [代码][代码]next(idx + 1);[代码][代码]                            [代码][代码]}[代码][代码]                        [代码][代码]});[代码][代码]                    [代码][代码]}[代码][代码]                [代码][代码]} [代码][代码]else[代码] [代码]{[代码][代码]                    [代码][代码]finish && finish();[代码][代码]                [代码][代码]}[代码] [代码]            [代码][代码]})(0);[代码][代码]        [代码][代码]},[代码][代码]        [代码][代码]fail: [代码][代码]function[代码] [代码](res) {[代码][代码]            [代码][代码]finish && finish();[代码][代码]        [代码][代码]},[代码][代码]    [代码][代码]});[代码][代码]}[代码]比如官方WX-Downloader.js里这个cleanAllFiles，假如我把这个readdir改成从预存的csv中读取，效率能提高吗