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> Bellard did this in 15 seconds, in 2004 with a 2.4Ghz Pentium 4

But isn't Linux kernel a lot bigger nowadays?

He did it with his own C compiler (tcc).

See: http://en.wikipedia.org/wiki/Tiny_C_Compiler#Compiled_progra...

There are tradeoffs for compiling very fast: Slower program execution.

The base kernel is not a lot bigger. There are about four times as many drivers. (But bellard's compilation only included the ones needed, IIRC. google tccboot for more info)

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