My guess is that IO latency is the reason why Javascript tools are slow. Creating lots of separate TCP connections to download a tarball and then store it to di

My guess is that IO latency is the reason why Javascript tools are slow. Creating lots of separate TCP connections to download a tarball and then store it to disk, then decompress it and then write the files it contains. Lots of small files IO slows things down versus one large contiguous file transfer. If it is IO that is causing slow project builds, then the IO in theory would be slow with compiled tools as well.