dkhoa.dev blogEngineering notes by Phan Minh Dang Khoa: IoT, automation, AI and infrastructure.https://dkhoa.dev/enPoint-adjusted F1 flatters anomaly detectors: notes on TSB-ADhttps://dkhoa.dev/blog/tsb-ad-point-adjusted-f1https://dkhoa.dev/blog/tsb-ad-point-adjusted-f1A NeurIPS 2024 benchmark re-scored 40 anomaly detectors on 1,070 curated time series, and a subsequence PCA came out on top of the univariate table.Sun, 25 Oct 2026 00:00:00 GMTGridFS uploads in NestJS: the file sits in memory firsthttps://dkhoa.dev/blog/gridfs-upload-memoryhttps://dkhoa.dev/blog/gridfs-upload-memoryIn dkhoa-dev/nestjs-multer-gridfs, downloads stream but uploads buffer the whole file. Here is where, and what to change.Sat, 24 Oct 2026 00:00:00 GMT