I believe I made a mistake, my previous comments are about CGI not FastCGI. Also I am not an expert so I will not be able to prove anything, but I can try my b

I believe I made a mistake, my previous comments are about CGI not FastCGI. Also I am not an expert so I will not be able to prove anything, but I can try my best to express my opinions. I do not think that node has any problems with FastCGI So basically Node's start latency are too slow for CGI and FastCGI is bad for a worker platforms (or for any multitenant offering). The reason is that cloudflare doesn't want to keep track which workers are for which customers and want to offer a clean slate environment for each request. This either means spinning up new processes or using some other in-process isolation techniques. All javascript workers platforms I know use V8 isolates, which (I believe) node does not offer. PS: I made also another mistake, it looks like deno offers a worker platform on V8 isolates. https://deno.com/deploy https://deno.com/deploy