https://bugzilla.mindrot.org/show_bug.cgi?id=3820
Bug ID: 3820
Summary: Around 5 second delay when starting an X11 application
Product: Portable OpenSSH
Version: 9.6p1
Hardware: All
OS: All
Status: NEW
Severity: normal
Priority: P5
Component: ssh
Assignee: [email protected]
Reporter: [email protected]
As of OpenSSH 9.6p1, when starting a X11 (ssh -X) application,
it takes around 5 seconds before the window finally appears.
I have seen this on Solaris but I've seen quite a few reports for Linux
and others.
This can be worked around by setting ObscureKeyStrokeTiming to no;
it appears that the code does not distinguish between actual
keys typed in or other data to be send.
In the point where we try to obscure the timing, we no longer
now where the data comes from.
$ ssh -X <host>
...
$ time xterm -e true
real 0m4.89s
user 0m0.05s
sys 0m0.07s
With older version (9.4p1 tried here):
$ time xterm -e true
real 0m0.37s
user 0m0.05s
sys 0m0.05s
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