Poor performance from decodeLenient

[arnoblalam]

Hi:

I am trying to use Wreq to build a library for Iron.IO message queueing service. I seem to be having some performance issues (the code runs an order of magnitude slower than python). The issue is documented here: https://stackoverflow.com/questions/27696738/why-is-my-haskell-code-so-slow

Profiler output seems to reveal that the majority of time is spent in the decodeLenient (family) of functions. I believe these calls are coming from Wreq, or one of the libraries that Wreq uses (such as http-client or tls). I suspect the issue might be coming from the tls library, or some other library that is decoding Base64 data.

I am not sure how to troubleshoot this issue further...

[ret]

Hi Arnob, reading the code in your stackoverflow question, it's likely that your tests spend time establishing a new connection for each request. Consider using a Session. See http://www.serpentine.com/wreq/tutorial.html#handling-multiple-http-requests.