very slow geocoding from Google geocoder

hi there,

I use the Google Geocoder to fill a Geofield from an Adressfield ... nothing special. And it works well on my DEV server (take only 1 or 2 seconds to fill the geofield correctly and save the node).

But it's getting slow when i do the same operation on my Production server (VPS) ... i mean very very slow (around 60 seconds to save to geocode and then save the node). It works at the end but why that difference ?
I guess, as the site configuration is the same, it's about the configuration of my production server ? But i really dont know where to look for as i'm not a developer.

Do you have any clues ?

Thx !