I always found onedrive services to be faster than google drive(the pdf viewer for instance).It seems that,recently,Gdrive downgraded their default pdf viewer,w

I always found onedrive services to be faster than google drive(the pdf viewer for instance).It seems that,recently,Gdrive downgraded their default pdf viewer,while proposing third party alternatives(which is an interesting system,I'm in the process of developping a good epub viewer for gdrive). Afaik,what MS does is,as much as possible,do things server side instead of client side.For instance,online excel calculations are done server side then the resulting cells are just HTML fragments sent to the ajax callback. It makes client apps consume way less memory,since less data is stored on the client. I have a crappy Android phone (2.x) and onedrive html app doesnt feel slow on it.On the other hand,I just cant use gmail(ajax versions) or google drive html apps.They are just not responsive.