Does having more disk space on the Hardrive (C) increase computer speed?

Also do you believe I should compress my whole hardrive? it says it will save diskspace... And if not, do you think i should only compress certain folders? what about the file named "WINDOWS" I'me running XP and want to compress some files to save disk space, and will it increase computer... show more Also do you believe I should compress my whole hardrive? it says it will save diskspace...

And if not, do you think i should only compress certain folders? what about the file named "WINDOWS" I'me running XP and want to compress some files to save disk space, and will it increase computer performance?

Thanks Computers experts!
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