[Qt-creator] Performance of the editor (with git plugin)

[Björn Schäpers]

Am 14.05.2023 um 06:58 schrieb André Hartmann:
> Hi Björn,
>
> Sorry for the inconvenience.
>
> Could you please create a bugreport for this so it is not forgotten?
>
> Meanwhile, I think you don't need to deactivate the whole git plugin,
> it would be enough to disable Instant Blame in Edit > Preferences >
> Version Control > Git.
>
> I can understand that getAuthorName takes some time because it is
> synchronous, but it would be nice to know which part of instantBlame()
> takes that much time because everything here should be async.
>
> Best regards,
> André
>
> Am 13.05.23 um 23:21 schrieb Björn Schäpers:
>> Am 11.05.2023 um 22:35 schrieb Björn Schäpers:
>>> Hi there,
>>>
>>> I recently got a new machine at work, sadly with a new(ly configured)
>>> anti virus software. And the performance of QtCreator when editing
>>> went down. I thought the anti virus was to blame (in a way it is,
>>> because if it's deactivated everything is fine again),
>>>
>>> [...]
>>>
>>> When I click into another editor (split view) or press F4 I've to wait
>>> about 3 seconds before I can continue to work.
>>>
>>> Kind regards,
>>> Björn.
>> While this is being worked on (and I tried that patch) I discovered my
>> delay comes from somewhere else. A little bit (de-)activating plugins to
>> see who is to blame I can say my main delay is produced by the lambda
>> "setupBlameForEditor" in GitPluginPrivate::steupInstantBlame.
>>
>> I put some qDebug timings in that function, the call to
>> GitClient::instance()->getAuthor(workingDirectory) takes something
>> between 1.1 and 1.4 seconds, and in the end the call to instantBlame()
>> takes another 1.2 to 1.3 seconds.
>>
>> While I still try to convince my IT department that tools like git are
>> not dangerous and should not be delayed by the anti virus, for now I
>> disable the git plugin. But it would be nice if maybe this code could
>> run on a different thread so that it doesn't block the main loop.
>>
>> Björn.
>>
>>
>
>
Many thanks!

I've created QTCREATORBUG-29151 for that, and added there the details what in 
instantBlame takes so long.