X2Go Bug report logs - #1515
x2goclient session resume is much slower on Windows than on Linux

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Package: x2goclient; Maintainer for x2goclient is X2Go Developers <x2go-dev@lists.x2go.org>; Source for x2goclient is src:x2goclient.

Reported by: "Abt, Johannes" <johannes.abt@advantest.com>

Date: Mon, 28 Dec 2020 11:35:02 UTC

Severity: normal

Found in version 4.1.2.2

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Report forwarded to x2go-dev@lists.x2go.org, X2Go Developers <x2go-dev@lists.x2go.org>:
Bug#1515; Package x2goclient. (Mon, 28 Dec 2020 11:35:02 GMT) (full text, mbox, link).


Acknowledgement sent to "Abt, Johannes" <johannes.abt@advantest.com>:
New Bug report received and forwarded. Copy sent to X2Go Developers <x2go-dev@lists.x2go.org>. (Mon, 28 Dec 2020 11:35:02 GMT) (full text, mbox, link).


Message #5 received at submit@bugs.x2go.org (full text, mbox, reply):

From: "Abt, Johannes" <johannes.abt@advantest.com>
To: "submit@bugs.x2go.org" <submit@bugs.x2go.org>
Subject: x2goclient session resume is much slower on Windows than on Linux
Date: Mon, 28 Dec 2020 11:33:24 +0000
Package: x2goclient
Version: 4.1.2.2

Synopsis: session resume takes much longer on Windows than on Linux (e.g. 25s vs 14s)

Preparing the benchmark on both Linux and Windows clients:
* Setup a custom ("/usr/bin/konsole") remote session
* Connection settigs: identical (for example: WAN, 64k-png-jpeg)

Create the Session:
* start the session on one of the clients => a remote "konsole" window opens up
* to get some graphics: "firefox https://www.kernel.org"; now there are two open windows
* suspend the session

Execute the Benchmark: on both clients:
* start the remote session
* use a stopwatch to get the elapsed time for both windows opening up and showing their content
* repeat the benchmark and use the median result

Expected result: same startup time

The result that I get is (on a 50MBit DSL line, with a RHEL7.4 server on x2go*-4.1.0.3-9.el7.x64_64): The 8 year old Linux client with two cores takes 14 seconds; the Windows laptop with a more modern CPU and much more RAM takes 25 seconds.


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