GetRequestStream is very slow

Question

When running a C# program which generates multiple network requests in a multi-threaded environment, I find that Request.GetRequestStream is quite slow, sometimes taking several seconds, and generally twice as long as the subsequent GetResponse. This is even though Proxy has been set to null, a "standard" fix.

What is the cause of this?

Of course the dupe didn't show up in about 20 minutes of web searching. — Hot Licks, Oct 20 '14 at 21:23

score 4 · Accepted Answer · answered Oct 20 '14 at 21:15

4

It turns out that .NET, by default, has a default limit of 2 for simultaneous connections. This of course will seriously throttle any app which does significant multithreading, and the delay will appear on the GetRequestStream call.

The "fix" is to alter the default limit to something more reasonable with:

ServicePointManager.DefaultConnectionLimit = newConnectionLimit;

My rickety Mac running Windows on VMWare seems to handle a value of 20 OK, but some care should be taken with the number as a large one will allow more resources to be tied up with no added performance.

answered Oct 20 '14 at 21:15

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You sure answered that one fast. – Xela Oct 20 '14 at 21:16
I submitted a question/answer to make the info findable on SO. The "dupe" above did not pop up in about 20 minutes of searching. – Hot Licks Oct 20 '14 at 21:26

GetRequestStream is very slow

1 Answers1