performance when using ExecMethod vbscript api

[kessler]

Copied directly from #7 :

See cscript-registry-benchmark and its output.

Calling registry.GetStringValue directly (eg, agnostic mode) is roughly 2x as fast as registry.ExecMethod_("GetStringValue", ..) with a "__ProviderArchitecture" flag / context.

The relevant bit of the output is (the third column is the difference to the agnostic duration):

Agnostic:                     2.219 sec  
64-bit:                       4.797 sec   +2.578 
64-bit (predefined method):   3.906 sec   +1.688 

As the third row shows, a small speed gain can be made by reusing the method object:

' Initialize
set method = registry.Methods_("GetStringValue")

' Then later ..
Set params = method.Inparameters
params.hDefKey = ..

Instead of doing registry.Methods_("GetStringValue").Inparameters each time.

PS. You might see "20000 sec" in the output, that's a formatting mistake, should be 2 seconds.