Python cgi FieldStorage slow, alternatives?

Question

I have a python cgi script that receives files uploaded via a http post. The files can be large (300+ Mb). The thing is, cgi.FieldStorage() is incredibly slow for getting the file (a 300Mb file took 6 minutes to be "received"). Doing the same by just reading the stdin took around 15 seconds. The problem with the latter is, i would have to parse the data myself if there are multiple fields that are posted.

Are there any faster alternatives to FieldStorage()?

Answer 1

"[I] would have to parse the data myself"

Why? CGI has a parser you can call explicitly.

Read the uploaded stream and save it in a local disk file.

For blazing speed, use a StringIO in-memory file. Just be aware of the amount of memory the upload will take.

Use cgi.parse(mylocalfile).