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Re:This Is Why Your Website Is Slow by allbutlost on Tuesday November 29, 2011 @01:54PM (#3291618)
AddThis, ShareThis etc are also popular culprits here.

I'm sure that this is choir-preaching at its finest, but using the non-async AddThis plugin should be avoided at all costs.

Re:This Is Why Your Website Is Slow by eli on Tuesday November 29, 2011 @02:09PM (#3291674)
shrug

I've seen one AddThis call replace half a dozen individual Javascript/IFrames for all the different social networks. Seems like that would generally be an improvement.