It is definitely slower on IE.
bugs
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             I can confirm this. I was just about to create a thread of my own saying the same thing. If I had to guess it's ~15% slower.  | 
    
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             What IE version? There are huge difference between them.  | 
    
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             differences*  | 
    
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             I've got IE8.  | 
    
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             Administrator  | 
        
             All right I was able to reproduce this on IE8. I'll take a look once I finish this achievements update.  | 
    
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             I see no difference. Using IE9  | 
    
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             <No Clan> 
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             WHO THE FUCK USES IE  | 
    
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             about 25% of the population  | 
    
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             nah, 25% of population cant be bothered to install something else except preinstalled browser on windows. most of them dont use internet much.  | 
    
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Toddy [104] | 
        
             ^^ +1  | 
    
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             IE was the best browser for playing bots since v6, so...  | 
    
