GK weather loading render speed

Hi There,

I have noticed mod_weather_gk4 v1.6.7 is my slowest rendermodule.
Any suggestion or way to further optimize this extension?

This is with cache enabled
Conservative caching - enable
Joomla 2.5.17
mod_weather_gk4 - enable use cache with cache time as 60 mins

Application 0.935 seconds (+0.000); 32.47 MB (-0.085) - beforeRenderModule mod_weather_gk4
Application 1.346 seconds (+0.411); 33.02 MB (+0.549) - afterRenderModule mod_weather_gk4

If the cache is enabled and the files in /cache directory are writable there is probably no easy way to speed up the render time. Module don't use database connection so there is only PHP code. Please note that there is a lot of matches between weather state - icon but that's all. The cURL request may be time-consuming but when the cache is enabled the request should be one for 60 minutes.

The difference is rather tiny when cache is enabled. Could there be something needs to be fix?

This is the result when global cache is disabled and all cache cleared.

Application 1.209 seconds (+0.001); 39.44 MB (-0.084) - beforeRenderModule mod_weather_gk4
Application 1.676 seconds (+0.467); 39.99 MB (+0.549) - afterRenderModule mod_weather_gk4

The cache files are in module/cache directory are created properly? What is the modification date of this file?

The files are created and updated properly. Same date timestamp and within the cache period (60mins, defined by me)

mod_weather_gk4/cache/mod_weather.backup.bxml
mod_weather_gk4/cache/mod_weather.bxml

So I have no idea which may slow down the module rendering - maybe this icons to weather condition matching but this part that we can't skip.

I have enabled the global cache by editing the module xml file. This cache the whole module.
At least for visitors (non login) site speed has improved.