Further optimization tricks - this time, a pretty simple one.
Often, if you modularise things into subroutines (generally a good idea,
right!!) you have code that might look like this...
; blah blah blah
jsr subroutine
rts
You can replace the above with a simple...
jmp subroutine
Let the subroutine itself do the returning for us. You save one byte
(whoooooo!) but also you gain 8 cycles - 6 as you're not doing the redundant
rts, and 2 because you're jumping instead of jsring. The general principle:
wherever you see a jsr followed immediately by a rts, you can replace the
pair with a jmp, AND AN EXPLANATORY COMMENT OF WHAT THE HELL YOU'VE DONE!!!!
Enjoy.
A
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