Hello,
while evaluating Akka-Http I noticed a significant performance difference
between normal and chunked encoding. It is the non-chunked case which is
much slower. The difference are significant - 1minute vs 4 seconds for a
10MB message on same HW.
It seems the explanation is really small ByteString sizes of the request
entity for the non-chunked case.
My code needs to read the request content into a buffer, for which I am
using StreamConverters, but for the investigation purposes I replaced this
with an explicit code [1].
For chunked encoding the println statement logs numbers close to the chunk
size used by the client e.q. for client using chunks of 1024B it says 1017.
For normal transfer encoding however the message says anything between 1
and 9 bytes all the time, 1-3 most of the time. It seems wrong to use such
small buffers.
Can this perhaps be fixed by configuration?
Thank you
David
[1]
// req is the HttpRequest coming from the handler
val read:Future[ByteArrayOutputStream] =
req.entity.dataBytes.runFold(baos)((baos,d)=>{
val arr = d.toArray
println(s"reading stream element of ${arr.length} bytes")
baos.write(arr)
baos
})
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