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binary tree

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R=rsc
DELTA=324  (323 added, 0 deleted, 1 changed)
OCL=32759
CL=32768
This commit is contained in:
Rob Pike 2009-08-04 19:38:08 -07:00
parent 4dec8ef35a
commit 3a23e53387
6 changed files with 413 additions and 1 deletions
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130
test/bench/binary-tree-freelist.go Normal file
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/*
Redistribution and use in source and binary forms, with or without
modification, are permitted provided that the following conditions are met:
* Redistributions of source code must retain the above copyright
notice, this list of conditions and the following disclaimer.
* Redistributions in binary form must reproduce the above copyright
notice, this list of conditions and the following disclaimer in the
documentation and/or other materials provided with the distribution.
* Neither the name of "The Computer Language Benchmarks Game" nor the
name of "The Computer Language Shootout Benchmarks" nor the names of
its contributors may be used to endorse or promote products derived
from this software without specific prior written permission.
THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
POSSIBILITY OF SUCH DAMAGE.
*/
/* The Computer Language Benchmarks Game
* http://shootout.alioth.debian.org/
*
* contributed by The Go Authors.
* based on C program by Kevin Carson
*/
package main
import (
"flag";
"fmt";
"os";
)
var n = flag.Int("n", 20, "depth")
type Node struct {
item int;
left, right *Node;
}
type Arena struct {
head *Node
}
var arena Arena
func (n *Node) free() {
if n.left != nil {
n.left.free()
}
if n.right != nil {
n.right.free()
}
n.left = arena.head;
arena.head = n;
}
func (a *Arena) New(item int, left, right *Node) *Node {
if a.head == nil {
nodes := make([]Node, 3 << uint(*n));
for i := 0; i < len(nodes)-1; i++ {
nodes[i].left = &nodes[i+1];
}
a.head = &nodes[0];
}
n := a.head;
a.head = a.head.left;
n.item = item;
n.left = left;
n.right = right;
return n;
}
func bottomUpTree(item, depth int) *Node {
if depth <= 0 {
return arena.New(item, nil, nil)
}
return arena.New(item, bottomUpTree(2*item-1, depth-1), bottomUpTree(2*item, depth-1))
}
func (n *Node) itemCheck() int {
if n.left == nil {
return n.item
}
return n.item + n.left.itemCheck() - n.right.itemCheck();
}
const minDepth = 4;
func main() {
flag.Parse();
maxDepth := *n;
if minDepth + 2 > *n {
maxDepth = minDepth + 2
}
stretchDepth := maxDepth + 1;
check := bottomUpTree(0, stretchDepth).itemCheck();
fmt.Println("stretch tree of depth ", stretchDepth, "\t check:", check);
longLivedTree := bottomUpTree(0, maxDepth);
for depth := minDepth; depth <= maxDepth; depth+=2 {
iterations := 1 << uint(maxDepth - depth + minDepth);
check = 0;
for i := 1; i <= iterations; i++ {
t := bottomUpTree(i,depth);
check += t.itemCheck();
t.free();
t = bottomUpTree(-i,depth);
check += t.itemCheck();
t.free();
}
fmt.Println(iterations*2, "\t trees of depth ", depth, "\t check: ", check);
}
fmt.Println("long lived tree of depth", maxDepth, "\t check:", longLivedTree.itemCheck());
}

165
test/bench/binary-tree.c Normal file
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/*
Redistribution and use in source and binary forms, with or without
modification, are permitted provided that the following conditions are met:
* Redistributions of source code must retain the above copyright
notice, this list of conditions and the following disclaimer.
* Redistributions in binary form must reproduce the above copyright
notice, this list of conditions and the following disclaimer in the
documentation and/or other materials provided with the distribution.
* Neither the name of "The Computer Language Benchmarks Game" nor the
name of "The Computer Language Shootout Benchmarks" nor the names of
its contributors may be used to endorse or promote products derived
from this software without specific prior written permission.
THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
POSSIBILITY OF SUCH DAMAGE.
*/
/* The Computer Language Shootout Benchmarks
http://shootout.alioth.debian.org/
contributed by Kevin Carson
compilation:
gcc -O3 -fomit-frame-pointer -funroll-loops -static binary-trees.c -lm
icc -O3 -ip -unroll -static binary-trees.c -lm
*/
#include <malloc.h>
#include <math.h>
#include <stdio.h>
#include <stdlib.h>
typedef struct tn {
struct tn* left;
struct tn* right;
long item;
} treeNode;
treeNode* NewTreeNode(treeNode* left, treeNode* right, long item)
{
treeNode* new;
new = (treeNode*)malloc(sizeof(treeNode));
new->left = left;
new->right = right;
new->item = item;
return new;
} /* NewTreeNode() */
long ItemCheck(treeNode* tree)
{
if (tree->left == NULL)
return tree->item;
else
return tree->item + ItemCheck(tree->left) - ItemCheck(tree->right);
} /* ItemCheck() */
treeNode* BottomUpTree(long item, unsigned depth)
{
if (depth > 0)
return NewTreeNode
(
BottomUpTree(2 * item - 1, depth - 1),
BottomUpTree(2 * item, depth - 1),
item
);
else
return NewTreeNode(NULL, NULL, item);
} /* BottomUpTree() */
void DeleteTree(treeNode* tree)
{
if (tree->left != NULL)
{
DeleteTree(tree->left);
DeleteTree(tree->right);
}
free(tree);
} /* DeleteTree() */
int main(int argc, char* argv[])
{
unsigned N, depth, minDepth, maxDepth, stretchDepth;
treeNode *stretchTree, *longLivedTree, *tempTree;
N = atol(argv[1]);
minDepth = 4;
if ((minDepth + 2) > N)
maxDepth = minDepth + 2;
else
maxDepth = N;
stretchDepth = maxDepth + 1;
stretchTree = BottomUpTree(0, stretchDepth);
printf
(
"stretch tree of depth %u\t check: %li\n",
stretchDepth,
ItemCheck(stretchTree)
);
DeleteTree(stretchTree);
longLivedTree = BottomUpTree(0, maxDepth);
for (depth = minDepth; depth <= maxDepth; depth += 2)
{
long i, iterations, check;
iterations = pow(2, maxDepth - depth + minDepth);
check = 0;
for (i = 1; i <= iterations; i++)
{
tempTree = BottomUpTree(i, depth);
check += ItemCheck(tempTree);
DeleteTree(tempTree);
tempTree = BottomUpTree(-i, depth);
check += ItemCheck(tempTree);
DeleteTree(tempTree);
} /* for(i = 1...) */
printf
(
"%li\t trees of depth %u\t check: %li\n",
iterations * 2,
depth,
check
);
} /* for(depth = minDepth...) */
printf
(
"long lived tree of depth %u\t check: %li\n",
maxDepth,
ItemCheck(longLivedTree)
);
return 0;
} /* main() */

93
test/bench/binary-tree.go Normal file
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/*
Redistribution and use in source and binary forms, with or without
modification, are permitted provided that the following conditions are met:
* Redistributions of source code must retain the above copyright
notice, this list of conditions and the following disclaimer.
* Redistributions in binary form must reproduce the above copyright
notice, this list of conditions and the following disclaimer in the
documentation and/or other materials provided with the distribution.
* Neither the name of "The Computer Language Benchmarks Game" nor the
name of "The Computer Language Shootout Benchmarks" nor the names of
its contributors may be used to endorse or promote products derived
from this software without specific prior written permission.
THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
POSSIBILITY OF SUCH DAMAGE.
*/
/* The Computer Language Benchmarks Game
* http://shootout.alioth.debian.org/
*
* contributed by The Go Authors.
* based on C program by Kevin Carson
*/
package main
import (
"flag";
"fmt";
"os";
)
var n = flag.Int("n", 20, "depth")
type Node struct {
item int;
left, right *Node;
}
func bottomUpTree(item, depth int) *Node {
if depth <= 0 {
return &Node{item: item}
}
return &Node{ item, bottomUpTree(2*item-1, depth-1), bottomUpTree(2*item, depth-1) }
}
func (n *Node) itemCheck() int {
if n.left == nil {
return n.item
}
return n.item + n.left.itemCheck() - n.right.itemCheck();
}
const minDepth = 4;
func main() {
flag.Parse();
maxDepth := *n;
if minDepth + 2 > *n {
maxDepth = minDepth + 2
}
stretchDepth := maxDepth + 1;
check := bottomUpTree(0, stretchDepth).itemCheck();
fmt.Println("stretch tree of depth ", stretchDepth, "\t check:", check);
longLivedTree := bottomUpTree(0, maxDepth);
for depth := minDepth; depth <= maxDepth; depth+=2 {
iterations := 1 << uint(maxDepth - depth + minDepth);
check = 0;
for i := 1; i <= iterations; i++ {
check += bottomUpTree(i,depth).itemCheck();
check += bottomUpTree(-i,depth).itemCheck();
}
fmt.Println(iterations*2, "\t trees of depth ", depth, "\t check: ", check);
}
fmt.Println("long lived tree of depth", maxDepth, "\t check:", longLivedTree.itemCheck());
}

8
test/bench/binary-tree.txt Normal file
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stretch tree of depth 16 check: -1
65536 trees of depth 4 check: -65536
16384 trees of depth 6 check: -16384
4096 trees of depth 8 check: -4096
1024 trees of depth 10 check: -1024
256 trees of depth 12 check: -256
64 trees of depth 14 check: -64
long lived tree of depth 15 check: -1

7
test/bench/timing.log
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@ -38,3 +38,10 @@ nbody 50000000
hacked Sqrt in assembler hacked Sqrt in assembler
gc nbody 31.97u 0.00s 32.01r gc nbody 31.97u 0.00s 32.01r
] ]
binary-tree 15 # too slow to use 20
gcc -O2 binary-tree.c -lm 0.86u 0.00s 0.87r
gccgo -O2 binary-tree.go 1.69u 0.46s 2.15r
gccgo -O2 binary-tree-freelist.go 8.48u 0.00s 8.48r
gc binary-tree 9.60u 0.01s 9.62r
gc binary-tree-freelist 0.48u 0.01s 0.50r

11
test/bench/timing.sh
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@ -48,9 +48,18 @@ nbody() {
run 'gc_B nbody' $O.out -n 50000000 run 'gc_B nbody' $O.out -n 50000000
} }
binarytree() {
echo 'binary-tree 15 # too slow to use 20'
run 'gcc -O2 binary-tree.c -lm' a.out 15
run 'gccgo -O2 binary-tree.go' a.out -n 15
run 'gccgo -O2 binary-tree-freelist.go' $O.out -n 15
run 'gc binary-tree' $O.out -n 15
run 'gc binary-tree-freelist' $O.out -n 15
}
case $# in case $# in
0) 0)
run="fasta revcom nbody" run="fasta revcom nbody binarytree"
;; ;;
*) *)
run=$* run=$*