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tip457-performance
# tip457-perfs.tcl
set loops 10000000
set hasArgspec [expr {![catch {info argspec specifier}]}]
# default implementation, no argspec, no named arguments
proc p1 {a b {c 0} {d 0} {e 0} {f 0} {g 0} {h 0} {i 0} {j 0}} {
list $a $b $c $d $e $f $g $h $i $j
}
# Tcl-pure implementation of named arguments handling
proc p2 {a b args} {
array set opt [concat {-C 0 -D 0 -E 0 -F 0 -G 0 -H 0 -I 0 -J 0} $args]
list $a $b $opt(-C) $opt(-D) $opt(-E) $opt(-F) $opt(-G) $opt(-H) $opt(-I) $opt
(-J)
}
if { $hasArgspec } {
# named arguments with extended argument specification
proc p3 {a b {c -default 0 -name C} {d -default 0 -name D} {e -default 0 -name
E} {f -default 0 -name F} {g -default 0 -name G} {h -default 0 -name H} {i -def
ault 0 -name I} {j -default 0 -name J}} {
list $a $b $c $d $e $f $g $h $i $j
}
# no named arguments but with extended argspec, uses new initialization code
proc p4 {{a -required 0} b {c 0} {d 0} {e 0} {f 0} {g 0} {h 0} {i 0} {j 0}} {
list $a $b $c $d $e $f $g $h $i $j
}
}
puts "default, 10 pos. args: [time {p1 A B 0 0 0 8 0 42 0 1} $loo
ps]"
puts "Tcl-pure, 2 pos. args, 2 named args: [time {p2 A B -J 1 -G 2} [expr $loops / 5]]"
if { $hasArgspec } {
puts "TIP-457, 2 pos. args, 2 named args: [time {p3 A B -J 1 -G 2} $loops]"
puts "ext-arg init code, 10 pos. args: [time {p4 A B 0 0 0 8 0 42 0 1} $loops]"
}
--------------------------------------------------------------------------------
default, 10 pos. args: 0.70609 microsecs per iteration
Tcl-pure, 2 pos. args, 2 named args: 5.7299 microsecs per iteration [+711%]
TIP-457, 2 pos. args, 2 named args: 0.7266612 microsecs per iteration [+2.9%]
ext-arg init code, 10 pos. args: 0.7209694 microsecs per iteration [+2.1%]
--------------------------------------------------------------------------------
default, 10 pos. args: 0.6948987 microsecs per iteration
Tcl-pure, 2 pos. args, 2 named args: 5.786593 microsecs per iteration [+732%]
TIP-457, 2 pos. args, 2 named args: 0.7150904 microsecs per iteration [+2.9%]
ext-arg init code, 10 pos. args: 0.7242224 microsecs per iteration [+4.2%]
--------------------------------------------------------------------------------
default, 10 pos. args: 0.6956328 microsecs per iteration
Tcl-pure, 2 pos. args, 2 named args: 5.6481645 microsecs per iteration [+711%]
TIP-457, 2 pos. args, 2 named args: 0.706861 microsecs per iteration [+1.6%]
ext-arg init code, 10 pos. args: 0.692382 microsecs per iteration [-0.4%]
--------------------------------------------------------------------------------
default, 10 pos. args: 0.6939689 microsecs per iteration
Tcl-pure, 2 pos. args, 2 named args: 5.625728 microsecs per iteration [+710%]
TIP-457, 2 pos. args, 2 named args: 0.7076775 microsecs per iteration [+2.0%]
ext-arg init code, 10 pos. args: 0.7052509 microsecs per iteration [+1.6%]
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