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GeneralStonewall
Magician
Joined: 02 Feb 2004
Posts: 364
Location: USA
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 Posted: Sat Oct 27, 2007 7:41 pm
[2.09] Loop optimization suggestion
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I use some rather large loops sometimes so I would like to see some loop optimization in certain cases. Currently these two aliases compile completely differently:
Alias:
| Code: |
<alias name="loop1" id="2448">
<value>#2 {
#echo 1
#2 {#echo 2}
}</value>
</alias> |
Compiled code:
| Code: |
0000 INT 2
0008 PUSHLOC 0024
0016 JUMP 0100
0024 INT 1
0032 CMD echo (1)
0044 INT 2
0052 PUSHLOC 0068
0060 JUMP 0088
0068 INT 2
0076 CMD echo (1)
0088 CMD repeat (2)
0100 CMD repeat (2) |
Alias:
| Code: |
<alias name="loop2" id="2449">
<value>#echo 1
#echo 2
#echo 2
#echo 1
#echo 2
#echo 2</value>
</alias> |
Compiled code:
| Code: |
0000 INT 1
0008 CMD echo (1)
0020 INT 2
0028 CMD echo (1)
0040 INT 2
0048 CMD echo (1)
0060 INT 1
0068 CMD echo (1)
0080 INT 2
0088 CMD echo (1)
0100 INT 2
0108 CMD echo (1) |
Both of these have the same exact result, but from my experience the 2nd example should be faster since it doesn't have to jump. I'd like to see the first alias be optimized to compile exactly like the 2nd alias in cases where constant numbers are used. I actually have no idea how much faster this would make anything, if even at all but I'm just throwing it out there. |
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Zugg
MASTER
Joined: 25 Sep 2000
Posts: 23379
Location: Colorado, USA
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Posted: Mon Oct 29, 2007 8:47 pm
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CMUD already has loop optimization within the #REPEAT and various #LOOP commands. Just because the compiled code is different, don't just assume that it is slower. But to answer your general question, no I do not plan to perform any fancy compiler optimizations. In general, the compiler is not the speed bottle-neck in CMUD. If you want the fastest compiled scripts, use Lua instead within CMUD since it has more optimizations in it.
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