Speed of Arduino vs C vs asm?

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i've got project i'm start working on, , speed arduino runs @ big deal in regards performance. i'm going using arduino translate inputs pc , send them device. there of loss when using arduino environment creating chip's firmware versus using c or assembly? i'd use arduino environment due ease of use, assembly isn't harder if better way go. info guys can provide appreciated.

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is there of loss when using arduino environment creating chip's firmware versus using c or assembly?

i don't understand how question goes this...

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i'm going using arduino translate inputs pc , send them device.

serial communications going be, far, slowest part of project.

what matter if reading digital input takes 100 nanoseconds longer c program when take 10 milliseconds value destination?


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