Excessive X traffic in response to key press in editor window

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#184 Excessive X traffic in response to key press in editor window

Milestone: Undefined

Status: open

Owner: Teodor Petrov

Labels: None

Type: Bug_Report

Updated: 2015-11-16

Created: 2015-07-09

Creator: James P Michels III

Private: No

When using codeblocks with a remote X display over a wide area network, key press takes approx 1 second to register. gedit key press over same network exhibits no perceptible delay.

While trying to troubleshoot, I ran wireshark to monitor the network traffic between the server and client. Each keypress in the editor window is triggering roughly 25 round trip calls to the X server. The duration of these ~25 calls corresponds to the delay observed in the editor window.

Environment
server connection via ssh -X
30ms ping to server
100mb/s bandwidth

Discussion

Teodor Petrov - 2015-07-09

Does this same problem happens with Scite, Geany or any other Scintilla based editor?

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James P Michels III - 2015-07-09

I just tested scite. scite is very responsive. About as responsive as gedit. No noticeable delay with scite.

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Teodor Petrov - 2015-07-09

Can you try to disable code completion plugin or any other non-core plugins?

Also can you do some profiling with perf/vtune/something else?

Last edit: Teodor Petrov 2015-07-09

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James P Michels III - 2015-07-10

I've tried disabling plugins with no success. Can you give me an idea what you are looking for with perf/vtune? The delay is easily explained by the X traffic and confirmed by wireshark. 25 messages times 30ms delay = 750ms.

Steps to reproduce.
1) Run codeblocks with a remote X display
2) Start capturing X traffic
3) Press a key in editor window.
4) See 25 X messages between X client and server.

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Teodor Petrov - 2015-07-10

I want to see the functions in our code that cause the transmission of these X messages. I think perf/vtune will show this.

Unfortunately I don't have a proper setup to reproduce this problem easily.

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James P Michels III - 2015-07-15

Unfortunately, I don't have the proper setup to perform the tests that you are requesting. That said, the steps that I outlined above can be used to reproduce the issue should someone with the proper setup find time to look into this.

Thanks for your help with this.

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Teodor Petrov - 2015-07-22

assigned_to: Teodor Petrov
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James P Michels III - 2015-11-13

This appears to be resolved in Release 13.12 rev 9501. Maybe sooner, but I have not tested.

Thanks

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Teodor Petrov - 2015-11-13

Can you do a bisect? What version of wx are you using 2.8 or 3.0?

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James P Michels III - 2015-11-16

wx3.0.2

No, I am not able to do a bisect.

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