[JASS] A weird Benchmark Result.

[BlinkBoy]

Hey everyone, today I was testing the benchmarking of different functions. I tried H2I, Pow among others. Something that left me shocked was when I benchmarked Sine vs DoNothing. Vexorian had proved that natives are a lot more faster than jass functions by comparing DoNothing with Cosine. I tried doing that test once more, but with sine, and the result was that DoNothing > Sine. Here's the code:

function Trig_Benchmark_Actions takes nothing returns nothing
local integer i = 0
local real r
local real g
//local player p = Player(0)
//local integer f = H2I(p)
local integer s = StopWatchCreate()
loop
    exitwhen i >= 5000
    call DoNothing()
    set i = i + 1
endloop
set g = StopWatchMark(s)
set i = 0
call StopWatchDestroy(s)
set s = StopWatchCreate()
loop
    exitwhen i >= 5000
    call Sin(2.) //i'm not assigning it to any value, in order for it to be faster
    set i = i + 1
endloop
set r = StopWatchMark(s)
call StopWatchDestroy(s)
//call BJDebugMsg(R2S(g))
call BJDebugMsg(R2SW(g,10,10))
call BJDebugMsg(R2SW(r,10,10))
endfunction

//===========================================================================
function InitTrig_Benchmark takes nothing returns nothing
    set gg_trg_Benchmark = CreateTrigger(  )
    call TriggerAddAction( gg_trg_Benchmark, function Trig_Benchmark_Actions )
endfunction

The results were: 0.006597519 seconds for DoNothing
0.007065160 seconds for Sine.

The thing is that Vexorian proved Cosine to be 3 times faster than DoNothing alone, but now I ask myself which mistake I made or if my test is right.

I also did another test.

function Useless takes real r returns nothing
endfunction

function Trig_Benchmark_Actions takes nothing returns nothing
local integer i = 0
local real r
local real g
//local player p = Player(0)
//local integer f = H2I(p)
local integer s = StopWatchCreate()
loop
    exitwhen i >= 5000
    call Useless(2.)
    set i = i + 1
endloop
set g = StopWatchMark(s)
set i = 0
call StopWatchDestroy(s)
set s = StopWatchCreate()
loop
    exitwhen i >= 5000
    call Sin(2.)
    set i = i + 1
endloop
set r = StopWatchMark(s)
call StopWatchDestroy(s)
//call BJDebugMsg(R2S(g))
call BJDebugMsg(R2SW(g,10,10))
call BJDebugMsg(R2SW(r,10,10))
endfunction

//===========================================================================
function InitTrig_Benchmark takes nothing returns nothing
    set gg_trg_Benchmark = CreateTrigger(  )
    call TriggerAddAction( gg_trg_Benchmark, function Trig_Benchmark_Actions )
endfunction

in this one Sine > Useless. The reasons may be 2: first Useless now takes an argument, which slows it down, and second, Useless is away from the top, thus it's slower than the rest.

Results
Useless: 0.0085
Sine: 0.0073

 

[The Reborn Devil]

I'm not sure, but where did you get this function: StopWatchCreate()?
I can't find it in common.j. Is it from RtC?

 

[BlinkBoy]

It comes with the Japi natives of Grimoire, it's use to do benchmarking.

 

[The Reborn Devil]

Ok, then I suppose the result is correct.

 

[LeP]

I use StoppWatchMark() a bit different:
globals
integer S=StopWatchCreate()
endglobals

function...
local real e
local real s=StopWatchMark(S)
...code
set e=StopWatchMark(S)

s-e=result

Maybe this is the error~
But i dont hink so :/
I had alot bugs in the past with stopwatches; if i used the in a term (set e=s-StopWatchMark(S)) i always got 0 ..

 

[BlinkBoy]

I use StoppWatchMark() a bit different:
globals
integer S=StopWatchCreate()
endglobals

function...
local real e
local real s=StopWatchMark(S)
...code
set e=StopWatchMark(S)

s-e=result

Maybe this is the error~
But i dont hink so :/
I had alot bugs in the past with stopwatches; if i used the in a term (set e=s-StopWatchMark(S)) i always got 0 ..

yeah, resting reals that are so low, normally brings some errors.

 

[Troll-Brain]

I dunno if it does matter or not.
But you create a StopWatch in a local declaration and after you set his variable.
I would say, be sure, always set the local.

function Trig_Benchmark_Actions takes nothing returns nothing
local integer i = 0
local real r
local real g
//local player p = Player(0)
//local integer f = H2I(p)
local integer s = 0
set s = StopWatchCreate()
loop
    exitwhen i >= 5000
    call DoNothing()
    set i = i + 1
endloop
set g = StopWatchMark(s)
set i = 0
call StopWatchDestroy(s)
set s = StopWatchCreate()
loop
exitwhen i >= 5000
    call Sin(2.) //i'm not assigning it to any value, in order for it to be faster
    set i = i + 1
endloop
set r = StopWatchMark(s)
call StopWatchDestroy(s)
//call BJDebugMsg(R2S(g))
call BJDebugMsg(R2SW(g,10,10))
call BJDebugMsg(R2SW(r,10,10))
endfunction

//===========================================================================
function InitTrig_Benchmark takes nothing returns nothing
    set gg_trg_Benchmark = CreateTrigger( )
    call TriggerAddAction( gg_trg_Benchmark, function Trig_Benchmark_Actions )
endfunction