Hi,
I don't understand, why:

is faster then:

the instruction lea eax,[eax] wasn't real used?

i think parts you omited (...) were important in this case. What is code for? Two codes you posted do different things, they are not functionaly equivalent

And I thought the same as you...
When i create some proc or part from proc i tested with well-known program(see TSCTest32.zip)
When i saw this method(lea eax,[eax]), for the first time in "lzo" decompress algorithm, i did revision of my standart used procs, and the results ware very intresting, but i don't understand why this happens(in 90% of the cases - standart used("IO", str and other) procs and macros are faster, not only in my computer)

lea eax, [eax] doesn't do anything but it aligns the following label and so the processor can read it faster. That's one of the basic rules of optimization - alignment.

EDIT: Example:
The code aligned to any miltiplication of 4 will be faster. If you want to use it, try 'align 4' fasm's directive as during coding you don't know what relative address there currently is.