[Phpmyadmin-devel] Navigation tree problems

Marc Delisle marc at infomarc.info
Tue Aug 27 17:10:41 CEST 2013

Marc Delisle a écrit :
> Michal Čihař a écrit :
>> Hi
>> Dne Tue, 27 Aug 2013 08:29:04 -0400
>> Marc Delisle <marc at infomarc.info> napsal(a):
>>> Michal Čihař a écrit :
>>>> Hi all
>>>> I've looked a bit about problems people see with navigation frame and
>>>> here is a little summary.
>>>> - Speed
>>>> The navigation panel is quite slow. By quickly looking at SQL queries
>>>> it does, the database/table comments are quite big culprit here. Simply
>>>> setting $cfg['ShowTooltip'] = false reduces load time a lot.
>>>> For not so big database (~25 tables), I get from 1.25s to 0.128s.
>>>> Are tooltips really worth of this? I suggest to drop this feature
>>>> completely. In case there will be demand for something like that, lets
>>>> load it on demand when user is hovering the table.
>>>> https://github.com/phpmyadmin/phpmyadmin/pull/646
>>> As I wrote in the pull request, I suggest instead to set the directive 
>>> to false by default, keeping the feature for those who need it. At least 
>>> for 4.0.x.
>> IMHO it makes navigation simply too slow to even provide option to
>> enable it. The problem is that there is probably no way to get table
>> comment fast - either you use information_schema, which is usually slow
>> for large databases (and therefore we do not use it by default) or SHOW
>> TABLE STATUS which is on normal installations even slower than
>> information_schema.
> OK then. Merged to QA_4_0 and I'm working to merge it to master.


>>>> - Preserving state on reload
>>>> This has been already discussed before.
>>> Kasun is working on that this week and maybe he should target QA_4_0 for 
>>> this "feature" (if it's not too much new code)?
>> I agree this should go into 4.0.x.

Maybe 4.0.7 for Kasun's changes?

Meanwhile I plan to release 4.0.6-rc1 in one hour unless someone objects.

Marc Delisle

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