[Gambas-user] Performance figures for various ways to do reflective method calls

[Brian G]

Hi martin,

  There is one more method to use which is defining ckey as an object
    Dim key3 As Object = New Ckey
    Debug "Start method direct call... object"
    startTime = Now()
    For i As Long = 1 To iterations
        result = key3._equals(key2)
    Next
    Debug Subst("Done in &1ms", DateDiff(startTime, Now, gb.Millisecond))

the timing looks like this
Main.Main.15: Start method direct call...
Main.Main.20: Done in 765ms
Main.Main.22: Start method direct call... object
Main.Main.27: Done in 1156ms
Main.Main.29: Start method reflective call...
Main.Main.34: Done in 5220ms
Main.Main.41: Start method eval call...
Main.Main.48: Done in 4554ms
Main.Main.50: Start blind method variant call...
Main.Main.57: Done in 1332ms


"Failure is the key to success; 
 each mistake teaches us something"  .. Morihei Ueshiba
Brian G

----- On Oct 13, 2023, at 4:47 PM, Martin Fischer martin.fischer6 at web.de wrote:

> Hi fellow gambassians,
> 
> I was interested in the performance of reflective method calls in
> gambas. I tested:
> - direct (early bound) method call
> - reflective via Object.Call
> - reflective via gb.eval
> - reflective via Variant
> 
> Here are the numbers:
> 
> Main.Main.11: Start method direct call...
> Main.Main.16: Done in 540ms
> Main.Main.18: Start method reflective call...
> Main.Main.23: Done in 4135ms
> Main.Main.30: Start method eval call...
> Main.Main.37: Done in 3469ms
> Main.Main.39: Start blind method variant call...
> Main.Main.46: Done in 1185ms
> 
> The absolute numbers are not relevant. These figures answer the
> question: "how much slower is reflective call compared to direct call".
> 
> Tiny Project is attached, if you want to reproduce.
> 
> Regards
> ____________________________________
> Martin Fischer
> 
> 
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