Author Topic: Undocumented TI-BASIC tricks (Read 83120 times)

tifreak · « **Reply #60 on:** December 26, 2005, 12:58:00 pm »

No problem, I hope you understand it...

Spellshaper · « **Reply #61 on:** December 27, 2005, 12:36:00 am »

yeah, now I do >D

tifreak · « **Reply #62 on:** December 27, 2005, 02:28:00 am »

Glad I could be of help.

dragon__lance · « **Reply #63 on:** December 28, 2005, 10:21:00 am »

now i've got a few questions, at the UnitedTi forum, there's a lot about max speed in basic. i'd like to know if they're true.
-are if-then statements faster than if statements?
-The more free ram, the faster the prgm will run?
-too much prgm in prgm menu, will run slower?
-does optimising improve speed, ex: not(A, A=0
-is while faster or repeat loops
Thanks if u can help...

tifreak · « **Reply #64 on:** December 28, 2005, 11:11:00 am »

If statements are faster, here is why:

Everytime the calculator sees a Then statement, or a loop, it registers how many End statements it sees. This of course takes little processing power (I think) but over a long period, it can cause a slow down, hence the memory leaks. If you just use an If statement, it doesn't need to worry about an End statement... Using an If statement only allows 1 command to be used, though, so watch yourself.

If I remember correctly, the amount of RAM does not slow down or speed up a program.

Actually, this will slow a program down a little, because that means it has to search the VAT entries for more programs.

Some optimizing does, but others can actually slow down a game.

If K=25:Then is actually faster then A-((K=25)-(K=26))->A because it is looking for the K with an If statement, but with the equation, it actually keeps doing the equation over and over. If K does not =25, then it ignores what ever comes after it.

I honestly don't know of a speed difference between the two, but there could be, if someone else here knows...

tenniskid493 · « **Reply #65 on:** December 28, 2005, 11:26:00 am »

Both While and Repeat Loops are equal in speed. I believe Arcane Wizard answered that at UnitedTi. I'll try to find the link.

EDIT: Fixed it.

tifreak · « **Reply #66 on:** December 28, 2005, 11:33:00 am »

Don't you mean while and repeat?

tenniskid493 · « **Reply #67 on:** December 28, 2005, 11:36:00 am »

Yup, sorry about that.

dragon__lance · « **Reply #68 on:** December 28, 2005, 11:41:00 am »

another questions: which are faster: subroutines or if-then statements?

tenniskid493 · « **Reply #69 on:** December 28, 2005, 11:44:00 am »

If:Then's are faster than subroutines. However, if you are doing the same thing inside the If:Then statement multiple times, you could save a lot of space by using subroutines. Its sort of a trade off.

dragon__lance · « **Reply #70 on:** December 28, 2005, 11:48:00 am »

anyone kno some cool optimisations using boolean logic (xor, or, and, not). one that i kno that toggles the number would be:
:N(A=0)->A
this will toggle A from 0 to the number(N). anyone kno more?

tenniskid493 · « **Reply #71 on:** December 28, 2005, 11:53:00 am »

For my walking engine, I used:

X-8(K=24)+8(K=26)->X
Y-8(K=25)+8(K=34)->Y

EDIT: Wait nvm, your the one who gave me that.

Radical Pi · « **Reply #72 on:** December 28, 2005, 12:35:00 pm »

All sorts of (), +, and = combinations can replace and/or.

Someone should make a Boolean converter for long expressions.

---EDIT---
And subtraction might be able to replace xor.

dragon__lance · « **Reply #73 on:** December 28, 2005, 02:46:00 pm »

wat do u mean? and ive got another question, will variable inputs run slower, faster, or same speed, for instance,
real(3,0,0,1
or
real(3,A,A,1 where A=0

tenniskid493 · « **Reply #74 on:** December 28, 2005, 03:17:00 pm »

I believe they run the same, however I am not positive on that.

I belive what Radical Pi meant was that instead of doing

c1-->

CODE

ec1If X=1 and Y=3
Z+15->Zc2

ec2

You can do
c1

-->

CODE

ec1Z+15(X=1)(Y=3)->Zc2

ec2

If thats not what you meant, post an example.

Author Topic: Undocumented TI-BASIC tricks (Read 83120 times)

dragon__lance

tenniskid493

tenniskid493

dragon__lance

tenniskid493

dragon__lance

tenniskid493

dragon__lance

tenniskid493