OpenEuphoria

2. Re: if statement optimization

• Posted by jeremy (admin) Oct 28, 2008
• 1042 views

I setup the example:

constant COUNT = 100000000 
constant HALF_COUNT = COUNT/2 
 
atom t1 = time() 
 
function case_one(integer i) 
  if i > HALF_COUNT then 
    return i 
  end if 
   
  return i 
end function 
 
function case_two(integer i) 
  if i > HALF_COUNT then 
    return i 
  else 
	return i 
  end if 
end function 
 
integer a = 1 
 
for i = 1 to COUNT do 
  a = case_one(i) 
end for 
 
puts(1, "Case One: ") 
? time() - t1 
t1 = time() 
 
for i = 1 to COUNT do 
  a = case_two(i) 
end for 
 
puts(1, "Case Two: ") 
? time() - t1 

and when running, I get:

C:\Users\Jeremy\Desktop>exwc test.ex 
Case One: 3.198 
Case Two: 3.200 
C:\Users\Jeremy\Desktop>exwc test.ex 
Case One: 3.198 
Case Two: 3.198 
C:\Users\Jeremy\Desktop>exwc test.ex 
Case One: 3.197 
Case Two: 3.198 

Jeremy

4. Re: if statement optimization

• Posted by frankied Oct 28, 2008
• 1018 views

if (condition) then 
    return 0 
else 
    return 1 
end if 

if (condition) then 
    return 0 
end if 
return 1 

     1: 020 135 9                        # IF: [condition:135] = 0 goto 0009 
     4: 028 136 137                      # RETURNF: [LIT 0:137] 
     7: 023 12                           # ELSE goto 0012 
     9: 028 136 133                      # RETURNF: [LIT 1:133] 
 
    12: 020 135 18                       # IF: [condition:135] = 0 goto 0018 
    15: 028 136 137                      # RETURNF: [LIT 0:137] 
    18: 028 136 133                      # RETURNF: [LIT 1:133] 

If you are just using it in general programming, what is accepted as the best programming practice? eg:

 
if (condition) then 
    -- do a really big operation here 
else 
    -- do a different really big operation here 
end if 
 

or

if (condition) then 
    -- do a really big operation here 
    return 
end if 
 
-- do a different really big operation here 
return 

or is it accepted as purely a matter of personal style

6. Re: if statement optimization

• Posted by unkmar Nov 11, 2008
• 924 views

 
if (condition) then 
    -- do a really big operation here 
else 
    -- do a different really big operation here 
end if 
 

if (condition) then 
    -- do a really big operation here 
    return 
end if 
 
-- do a different really big operation here 
return 

The code below will cause me to want to kick your teeth in.
Thankfully, our geographical dispersion and my usual kind nature would prevent that.

if (condition) then 
    -- any amount of code 
    return 
else 
    -- lots of code 
    return 
end if 
 
-- I prefer 
object result 
if (condition) then 
    -- any amount of code 
    result = "TRUE" 
else 
    -- lots of code 
    result = "FALSE" 
end if 
 
-- print(LOGFILE, result) 
-- Thus allowing for easy debugging. 
return result