Is a MSX2 machine slower than a MSX1 one?

Just as a curiosity, this is the new performance of the NMS-8245 after aplying the following patch (left, patched hook):

The code (very limited now):

htimi:	ld hl,REPCNT
	ld a,(hl)
	dec a
	jr z,.incr
	cp 1
	jr z,.end
	ret
.incr:  ld a,2
.end:	ld (hl),a
	ret

htimi:	ld hl,REPCNT
	ld a,(hl)
	dec a
	jr z,.incr
	cp 1
	jr z,.end
	ret
.incr:  ld a,2
.end:	ld (hl),a
	ret

dec a vs. cp 1
dec a is a smaller and faster way to check if a equal 1

You're right, and the gain is too insignificant if we do "inc a" after, forget what I said

jltursan, what do you mean exactly? openMSX effects have no influence on the timing of the running MSX programs of course...

I hope this does not count as necroposting, but I would like to add some details in case someone reaches this thread in the future:

It seems to be some relationship between the value the SCNCNT is reset (ld [hl],n ; @$0c96) to and the values REPCNT is initially set, then reset (ld a,n ; @$0d49 and ld [hl],n ; @$0cf0). The SCNCNT is loosely correlated to the MSX generation, but there are differences between 50/60Hz and every some particular models:

• Most MSX 1 do scan every 3 frames (and repeat key every scan after a delay of 13 scans).
• But several MSX 1 50Hz (Casio MX-15, Sony HitBit 10P/20P/101P/201P/501P, Yamaha CX5MII and maybe others) do scan every frame (and repeat key every 3 scans after a delay of 39 scans). I guess this was a decision to make the typing more responsive and, as there are more CPU time per frame, performance is not worse than 60Hz counterparts. Note the values of the repeat key are adjusted so the feeling is similar. Curiously enough, Sony HitBit 55P/75P/75D do not fall into this category, but the previous one (scan every 3 frames).
• Some MSX 2/2+ 60Hz (Sony HitBit F1/F1XD/F1XDJ/F1XV; maybe other computers as well) do scan every two frames (and repeat key every scan after a dealy of 20 scans).
• Sony HitBit F9P do scan every frame, but repeat key every 2 scans after a delay of 32 scans. The Russian variant of this computer falls into the previous category.

Disclaimer: Please take this with a grain of salt. I have found this doing something completely unrelated, so I haven't checked all the BIOS (but the ones that were relevant for me) and I haven't verified one by one I was using the right dump, but trusted the filenames.