Good that the bottle neck is clearly identified. On a related topic, we're starting to benchmark our web services, and we're using http://gatling.io as benchmarking tool. It is Scala based and I'd like to write the benchmarking program in Haskell instead. However I need a tool that can record the duration of each requests, and maybe aggregate them and export this to some format (I don't care about the plots right now). I don't know of wrecker has this capabilities or maybe there are other tools that the Haskell community use for this purpose. Any hints? Op 7 okt. 2016 16:09 schreef "Jonathan Fischoff" < jonathangfischoff@gmail.com>:

hvr's comment on reddit sums up the issues well: https://www.reddit.com/ r/haskell/comments/55ywoy/ann_wrecker_an_http_benchmarking_library/d8f0svb

`http-client` is not designed for this use case. It's header parsing is too slow specifically.

`wrecker` and `wreck` are fine in the 10-100 range for typical requests (30 - 300 ms)

`wrecker` can and will get better (possibly with uhttpc under the hood), but if you have to sequence API together with processing between to profile your API, `wrecker` is a great option because there is nothing as accurate (that I know of) that can do that well.

On Fri, Oct 7, 2016 at 6:56 AM, Damian Nadales wrote:

...

We're using Gatling at work http://gatling.io/docs/2.2.2/ (Scala based), and I'm looking for similar tools in Haskell (if they don't exist is a nice project to work on I find).

Do you have any idea why `wreck` produces inflated results?

...

I am happy to announce the release of 'wrecker-0.1.3.2', a library for HTTP benchmarks.

'wrecker' makes it easy to benchmark complex API interactions, by

On Wed, Oct 5, 2016 at 12:59 PM, Jonathan Fischoff wrote: providing

...

a 'wreq' like interface for creating suites of HTTP benchmarks.

For more detailed information, tutorials, and examples checkout the README.md

https://github.com/skedgeme/wrecker/blob/master/README.md

Additionally there is documentation on Hackage: https://hackage.haskell.org/package/wrecker.

Cheers, Jonathan Fischoff

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