Parameter passing benchmark test
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Revision as of 02:43, 6 November 2007 by Larryducie (talk | contribs) (New page: Below is the code for a test program designed benchmark the passing of large character data to a subprocedure. To call this program simply call it from a with a numeric parameter. This par...)
Below is the code for a test program designed benchmark the passing of large character data to a subprocedure. To call this program simply call it from a with a numeric parameter. This parameter will instruct the program to perform that number of calls for each test. the results will be an average call time for each test.
The results will be displayed on the terminal.
It may be necessary to amend the code to measure the call time more accurately, or to provide an aggregate call time. this is because on extremely fast machines the values returned may be less than 1 ms per call.
H dftactgrp(*no) bnddir('QC2LE')
d valueconst pr extpgm('VALUECONST')
d ntimes 15p 5 const
d valueconst pi
d ntimes 15p 5 const
d byvalue pr
d bigparm 65535a varying value
d byconst pr
d bigparm 65535a varying const
d byvalueC pr
d bigparm 65535a value
d byconstC pr
d bigparm 65535a const
d printf pr extproc('printf')
d * value options(*string)
d getchar pr 10i 0 extproc('getchar')
d startTime s z
d endTime s z
d t1 s 10i 0
d t2 s 10i 0
d msg s 52a
d i s 10i 0
d crlf c const(X'0d25')
d char100 s 100a varying inz(*all'X')
d char1000 s 1000a varying inz(*all'X')
d char65535 s 65535a varying inz(*all'X')
d varyingField s 65535a varying
d charField s 65535a
/free
printf('----------------------------------------------' + crlf);
printf('Starting test...' + crlf);
// For VARYING...
startTime = %timestamp();
for i = 1 to %int(ntimes);
byvalue ('a');
endfor;
endTime = %timestamp();
t1 = (%diff(endTime : startTime : *ms)/ntimes);
startTime = %timestamp();
for i = 1 to %int(ntimes);
byconst ('a');
endfor;
endTime = %timestamp();
t2 = (%diff(endTime : startTime : *ms)/ntimes);
printf('Passing the literal _a_ for 65535a varying...' + crlf);
printf('value: ' + %editc(t1 : 'P') + ' ms | '
+ 'const: ' + %editc(t2 : 'P') + ' ms' + crlf);
varyingField = char100;
startTime = %timestamp();
for i = 1 to %int(ntimes);
byvalue (varyingField);
endfor;
endTime = %timestamp();
t1 = (%diff(endTime : startTime : *ms)/ntimes);
startTime = %timestamp();
for i = 1 to %int(ntimes);
byconst (varyingField);
endfor;
endTime = %timestamp();
t2 = (%diff(endTime : startTime : *ms)/ntimes);
printf('Passing a 65535a varying with 100a filled...' + crlf);
printf('value: ' + %editc(t1 : 'P') + ' ms | '
+ 'const: ' + %editc(t2 : 'P') + ' ms' + crlf);
varyingField = char1000;
startTime = %timestamp();
for i = 1 to %int(ntimes);
byvalue (varyingField);
endfor;
endTime = %timestamp();
t1 = (%diff(endTime : startTime : *ms)/ntimes);
startTime = %timestamp();
for i = 1 to %int(ntimes);
byconst (varyingField);
endfor;
endTime = %timestamp();
t2 = (%diff(endTime : startTime : *ms)/ntimes);
printf('Passing a 65535a varying with 1000a filled...' + crlf);
printf('value: ' + %editc(t1 : 'P') + ' ms | '
+ 'const: ' + %editc(t2 : 'P') + ' ms' + crlf);
varyingField = char65535;
startTime = %timestamp();
for i = 1 to %int(ntimes);
byvalue (varyingField);
endfor;
endTime = %timestamp();
t1 = (%diff(endTime : startTime : *ms)/ntimes);
startTime = %timestamp();
for i = 1 to %int(ntimes);
byconst (varyingField);
endfor;
endTime = %timestamp();
t2 = (%diff(endTime : startTime : *ms)/ntimes);
printf('Passing a 65535a varying with 65535a filled...' + crlf);
printf('value: ' + %editc(t1 : 'P') + ' ms | '
+ 'const: ' + %editc(t2 : 'P') + ' ms' + crlf);
// For CHAR...
startTime = %timestamp();
for i = 1 to %int(ntimes);
byvalueC ('a');
endfor;
endTime = %timestamp();
t1 = (%diff(endTime : startTime : *ms)/ntimes);
startTime = %timestamp();
for i = 1 to %int(ntimes);
byconstC ('a');
endfor;
endTime = %timestamp();
t2 = (%diff(endTime : startTime : *ms)/ntimes);
printf('Passing the literal _a_ for 65535a...' + crlf);
printf('value: ' + %editc(t1 : 'P') + ' ms | '
+ 'const: ' + %editc(t2 : 'P') + ' ms' + crlf);
charField = char100;
startTime = %timestamp();
for i = 1 to %int(ntimes);
byvalueC (charField);
endfor;
endTime = %timestamp();
t1 = (%diff(endTime : startTime : *ms)/ntimes);
startTime = %timestamp();
for i = 1 to %int(ntimes);
byconstC (charField);
endfor;
endTime = %timestamp();
t2 = (%diff(endTime : startTime : *ms)/ntimes);
printf('Passing a 65535a with 100a filled...' + crlf);
printf('value: ' + %editc(t1 : 'P') + ' ms | '
+ 'const: ' + %editc(t2 : 'P') + ' ms' + crlf);
charField = char1000;
startTime = %timestamp();
for i = 1 to %int(ntimes);
byvalueC (charField);
endfor;
endTime = %timestamp();
t1 = (%diff(endTime : startTime : *ms)/ntimes);
startTime = %timestamp();
for i = 1 to %int(ntimes);
byconstC (charField);
endfor;
endTime = %timestamp();
t2 = (%diff(endTime : startTime : *ms)/ntimes);
printf('Passing a 65535a with 1000a filled...' + crlf);
printf('value: ' + %editc(t1 : 'P') + ' ms | '
+ 'const: ' + %editc(t2 : 'P') + ' ms' + crlf);
charField = char65535;
startTime = %timestamp();
for i = 1 to %int(ntimes);
byvalueC (charField);
endfor;
endTime = %timestamp();
t1 = (%diff(endTime : startTime : *ms)/ntimes);
startTime = %timestamp();
for i = 1 to %int(ntimes);
byconstC (charField);
endfor;
endTime = %timestamp();
t2 = (%diff(endTime : startTime : *ms)/ntimes);
printf('Passing a 65535a with 65535a filled...' + crlf);
printf('value: ' + %editc(t1 : 'P') + ' ms | '
+ 'const: ' + %editc(t2 : 'P') + ' ms' + crlf);
printf('Test ended - press ENTER to close window...' + crlf);
printf('----------------------------------------------' + crlf);
// Read 1 char from the keyboard - to force display of screen...
i = getchar();
*inlr = *on;
/end-free
P byvalue b
D byValue pi
D bigParm 65535a varying value
P byValue e
P byConst b
D byConst pi
D bigParm 65535a varying const
P byConst e
P byvalueC b
D byValueC pi
D bigParm 65535a value
P byValueC e
P byConstC b
D byConstC pi
D bigParm 65535a const
P byConstC e
