[dart-misc] http performance issue?

Discussion:

Erik Grimes

2016-10-13 19:19:49 UTC

Hello all,

I'm seeing some excessive http response times between a dart client and a
dart server (sdk 1.19.1), both on my mac (os x 10.11.6). Here's some rough
code where I get the problem.

var client = new http.Client();

Stopwatch sw = new Stopwatch();
sw.start();

var response = await client.get(Uri.parse("http://localhost:10080"));

sw.stop();

print('response received ${sw.elapsedMilliseconds}');
client.close();

var handler = (Request r){
return new Response.ok("hello");
} ;

var server = await serve(const Pipeline()
.addMiddleware(logRequests())
.addHandler(handler), InternetAddress.ANY_IP_V4, 10080);

print('Serving at http://${server.address.host}:${server.port}');

It takes about 5 seconds to get a response from the server using the above
code. The same client code retrieves google.com in less than a second.
Thoughts?

Thanks,

Erik

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Erik Grimes

2016-10-13 19:25:42 UTC

Permalink

Chrome takes about 4ms to get the response back.

Post by Erik Grimes
Hello all,
I'm seeing some excessive http response times between a dart client and a
dart server (sdk 1.19.1), both on my mac (os x 10.11.6). Here's some rough
code where I get the problem.
var client = new http.Client();
Stopwatch sw = new Stopwatch();
sw.start();
var response = await client.get(Uri.parse("http://localhost:10080"));
sw.stop();
print('response received ${sw.elapsedMilliseconds}');
client.close();
var handler = (Request r){
return new Response.ok("hello");
} ;
var server = await serve(const Pipeline()
.addMiddleware(logRequests())
.addHandler(handler), InternetAddress.ANY_IP_V4, 10080);
print('Serving at http://${server.address.host}:${server.port}');
It takes about 5 seconds to get a response from the server using the above
code. The same client code retrieves google.com in less than a second.
Thoughts?
Thanks,
Erik

Erik Grimes

2016-10-14 15:45:16 UTC

Permalink

Switching from "localhost" to "127.0.0.1" in the request url got the
response time back to normal. Bug filed:
https://github.com/dart-lang/http/issues/44

Post by Erik Grimes
Chrome takes about 4ms to get the response back.

Post by Erik Grimes
Hello all,
I'm seeing some excessive http response times between a dart client and a
dart server (sdk 1.19.1), both on my mac (os x 10.11.6). Here's some rough
code where I get the problem.
var client = new http.Client();
Stopwatch sw = new Stopwatch();
sw.start();
var response = await client.get(Uri.parse("http://localhost:10080"));
sw.stop();
print('response received ${sw.elapsedMilliseconds}');
client.close();
var handler = (Request r){
return new Response.ok("hello");
} ;
var server = await serve(const Pipeline()
.addMiddleware(logRequests())
.addHandler(handler), InternetAddress.ANY_IP_V4, 10080);
print('Serving at http://${server.address.host}:${server.port}');
It takes about 5 seconds to get a response from the server using the
above code. The same client code retrieves google.com in less than a
second. Thoughts?
Thanks,
Erik