Cheat Engine

[Mateon1]

I was testing inline assembly in gcc, and I noticed it was significantly (8x!) faster if I added a few NOPs before the test loop. I decided to look into that with CE's disassembler.
I still don't know what was causing that, BUT if CE was attached to the .exe file, the program failed to load, returning
1963259017 (0x7504F489)

Any idea why that is happening? Both the magical NOP speedup and why CE attaching to the file made the program fail to load.

The NOP speedup certainly isn't aligning code for the jump address to be %0x10 or %0x8, the program finished the fastest when the jmp pointed to 0x00000771 in the .exe file.

EDIT: Typos.

[justa_dude]

Try using a profiler. As for why it's crashing, no clue. You haven't really given us a lot of background information.