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proc bench {title script} {
while {[string length $title] < 20} {
append title " "
}
puts "$title - [time $script]"
}
### BUSY LOOP ##################################################################
proc x {} {
set i 0
while {$i < 1850000} {
incr i
}
}
### FIBONACCI ##################################################################
proc fibonacci {x} {
if {$x <= 1} {
expr 1
} else {
expr {[fibonacci [expr {$x-1}]] + [fibonacci [expr {$x-2}]]}
}
}
### HEAPSORT ###################################################################
set IM 139968
set IA 3877
set IC 29573
set last 42
proc make_gen_random {} {
global IM IA IC
set body "
global last
expr {(\$max * \[set last \[expr {(\$last * $IA + $IC) % $IM}\]\]) / $IM}
"
proc gen_random {max} $body
}
proc heapsort {ra_name} {
upvar 1 $ra_name ra
set n [llength $ra]
set l [expr {$n / 2}]
set ir [expr {$n - 1}]
while 1 {
if {$l} {
set rra [lindex $ra [incr l -1]]
} else {
set rra [lindex $ra $ir]
lset ra $ir [lindex $ra 0]
if {[incr ir -1] == 0} {
lset ra 0 $rra
break
}
}
set i $l
set j [expr {(2 * $l) + 1}]
while {$j <= $ir} {
set tmp [lindex $ra $j]
if {$j < $ir} {
if {$tmp < [lindex $ra [expr {$j + 1}]]} {
set tmp [lindex $ra [incr j]]
#eval [list a b c]
}
}
if {$rra >= $tmp} {
break
}
lset ra $i $tmp
incr j [set i $j]
}
lset ra $i $rra
}
}
proc heapsort_main {} {
set n 6100
make_gen_random
set data {}
for {set i 1} {$i <= $n} {incr i} {
lappend data [gen_random 1.0]
}
heapsort data
}
### SIEVE ######################################################################
proc sieve {num} {
while {$num > 0} {
incr num -1
set count 0
for {set i 2} {$i <= 8192} {incr i 1} {
set flags($i) 1
}
for {set i 2} {$i <= 8192} {incr i 1} {
if {$flags($i) == 1} {
# remove all multiples of prime: i
for {set k [expr {$i+$i}]} {$k <= 8192} {incr k $i} {
set flags($k) 0
}
incr count 1
}
}
}
return $count
}
### ARY ########################################################################
proc ary n {
for {set i 0} {$i < $n} {incr i} {
set x($i) $i
}
set last [expr {$n - 1}]
for {set j $last} {$j >= 0} {incr j -1} {
set y($j) $x($j)
}
}
### REPEAT #####################################################################
proc repeat {n body} {
for {set i 0} {$i < $n} {incr i} {
uplevel 1 $body
}
}
proc use_repeat {} {
set x 0
repeat {1000000} {incr x}
}
### UPVAR ######################################################################
proc myincr varname {
upvar 1 $varname x
incr x
}
proc upvartest {} {
set y 0
for {set x 0} {$x < 100000} {myincr x} {
myincr y
}
}
### NESTED LOOPS ###############################################################
proc nestedloops {} {
set n 10
set x 0
incr n 1
set a $n
while {[incr a -1]} {
set b $n
while {[incr b -1]} {
set c $n
while {[incr c -1]} {
set d $n
while {[incr d -1]} {
set e $n
while {[incr e -1]} {
set f $n
while {[incr f -1]} {
incr x
}
}
}
}
}
}
}
### RUN ALL ####################################################################
bench {busy loop} {x}
bench {fibonacci(25)} {fibonacci 25}
bench {heapsort} {heapsort_main}
bench {sieve} {sieve 10}
bench {ary} {ary 100000}
bench {repeat} {use_repeat}
bench {upvar} {upvartest}
bench {nested loops} {nestedloops}
|
