>?= (Pipeline.compose) on freya<PipelineChoice> and freyaRouter causes significant delay in every request

[et1975]

Essentially doing this: https://blog.mavnn.co.uk/logging-freya/
and finding that adding the composition affects every request - it takes a significant CPU hit (response time going from ~20ms to ~300ms). Tests indicate that it's something in the composition itself, as injecting the value into the freya state takes no time at all.

Sample code:

let owin : OwinMidFunc = 
        OwinMidFunc.ofFreya (Polyfill.kestrel
                                    >?= withLogger "log"
                                    >?= apiPipeline)
app.UseOwin(fun p -> p.Invoke owin)

Wondering if I'm doing it wrong, or maybe there's a way to optimize that away.

[panesofglass]

I'm guessing there is a way to optimize this. Glad to know I'm not crazy. I found this same issue in the past but didn't have time to figure out why it was so bad.