go，java比较快，php比较慢
下面是java代码
public static void test(){
long start =System.currentTimeMillis();
System.out.println( start);
int count=1000000000;
int num=0;
long end =0;
for(int i =0;i<count;i++){
num++;
end = new Date().getTime()-start;
}
// end = System.currentTimeMillis();
System.out.println(end);
start =System.currentTimeMillis();
num=0;
for(int i =0;i<count;i++){
++num;
long end2 =new Date().getTime();
end = end2-start;
}
System.out.println(end);
start =System.currentTimeMillis();
num=0;
while (count>num){
++num;
long end2 =new Date().getTime();
end = end2-start;
}
System.out.println(end);
}
处理时间毫秒:
5434
5168
5215
public static void test(){
long start =System.currentTimeMillis();
System.out.println( start);
int count=100000000;
int num=0;
long end =0;
List<Integer> arr = new ArrayList<>();
for(int i =0;i<count;i++){
num++;
arr.add(num);
// end = new Date().getTime()-start;
}
// arr=new ArrayList<>();
end = new Date().getTime()-start;
System.out.println(end);
System.out.println(arr.size());
}
结果
1727054001864
56387
100000000
go
func main() {
count := 1000000000
num := 0
var str string
var end int64
start := time.Now().UnixNano() / 1e6
num = 0
for i := 0; i < count; i++ {
num = 1 + num
//str = ""
//var str2 = "a法大师傅大师傅法大师傅大师傅"
//str = str2
end2 := time.Now().UnixNano()/1e6 - start
end = end2
}
end = time.Now().UnixNano()/1e6 - start
log.Println("for ++i:{d}；{d}", end, num, str)
start = time.Now().UnixNano() / 1e6
log.Println(start)
for i := 0; i < count; i++ {
num++
end = time.Now().UnixNano()/1e6 - start
}
end = time.Now().UnixNano()/1e6 - start
log.Println("for i++:{d}；{d}", end, num)
log.Fatalln()
start = time.Now().UnixNano() / 1e6
log.Println(start)
for i := 0; i < count; i++ {
num++
str = ""
var str2 = "a法大师傅大师傅法大师傅大师傅"
str = str2
end = time.Now().UnixNano()/1e6 - start
}
end = time.Now().UnixNano()/1e6 - start
log.Println("for i++:{d}；{d}", end, num)
start = time.Now().UnixNano() / 1e6
num = 0
for num < count {
num = 1 + num
str = ""
var str2 = "a法大师傅大师傅法大师傅大师傅"
str = str2
end = time.Now().UnixNano()/1e6 - start
}
end = time.Now().UnixNano()/1e6 - start
log.Println("for ++i:{d}；{d}", end, num, str)
start = time.Now().UnixNano() / 1e6
num = 0
for num < count {
num++
str = ""
var str2 = "a法大师傅大师傅法大师傅大师傅"
str = str2
end = time.Now().UnixNano()/1e6 - start
}
end = time.Now().UnixNano()/1e6 - start
log.Println("for ++i:{d}；{d}", end, num, str)
}
处理时间毫秒是java的1/3
2024/09/22 12:05:30 for ++i:{d}；{d} 15724 1000000000
2024/09/22 12:05:30 1726977930443
2024/09/22 12:05:45 for i++:{d}；{d} 15430 2000000000
start = time.Now().UnixNano() / 1e6
log.Println(start)
var arr []int
for i := 0; i < count; i++ {
num++
//end = time.Now().UnixNano()/1e6 - start
arr = append(arr, num)
}
//arr = nil
end = time.Now().UnixNano()/1e6 - start
log.Println("for i++:{d}；{d}", end, num, len(arr))
结果
2024/09/23 09:15:52 1727054152806
2024/09/23 09:15:53 for i++:{d}；{d} 1062 200000000 100000000
php 处理时间=go的10分之一
下面是php的测试
php循环1亿次，java和go是循环10亿次，同样精确到毫秒
public function test()
{
$num=0;
$time=intval( time() *1000 +microtime(true));
$data=[];
echo $time;
print_r( "\n");
$ts=100000000;
while ($num< $ts){
++$num;
$time2=intval(time() *1000 +microtime(true));
}
$time2=intval(time() *1000 +microtime(true));
$data['++i']=[$time2-$time];
$time=intval( time() *1000 +microtime(true));
$num=0;
while ($num< $ts){
$num++;
$time2=intval(time() *1000 +microtime(true));
}
$time2=intval(time() *1000 +microtime(true));
$data['i++']=[$time2-$time];
// $data['substring']=$substring;
print_r($data);
// $text =(new Chat)->outFilter($word);
// print_r( $text);
exit();
结果
1728704477500
Array
(
[++i] => Array
(
[0] => 12012
)
[i++] => Array
(
[0] => 13013
)
)
php测试2 测试循环读写内存
public function test()
{
$num=0;
$time=intval( time() *1000 +microtime(true));
$data=[];
echo $time;
print_r( "\n");
$ts=100000000;
while ($num< $ts){
++$num;
$str = "Hello, World!";
unset($str );
$str = "Hello, World!";
unset($str );
// $time2=intval(time() *1000 +microtime(true));
// $str = "Hello, World!";
// $substring = substr($str, 0, 5); // 截取从第0个字符开始的5个字符
}
$time2=intval(time() *1000 +microtime(true));
$data['++i']=[$time2-$time];
$time=intval( time() *1000 +microtime(true));
$num=0;
while ($num< $ts){
$num++;
// $time2=intval(time() *1000 +microtime(true));
$str = "Hello, World!";
unset($str );
$str = "Hello, World!";
unset($str );
// $substring = substr($str, 0, 5); // 截取从第0个字符开始的5个字符
}
$time2=intval(time() *1000 +microtime(true));
$data['i++']=[$time2-$time];
// $data['substring']=$substring;
print_r($data);
// $text =(new Chat)->outFilter($word);
// print_r( $text);
exit();
php循环1亿次，java和go是循环10亿次，同样精确到毫秒
结果
Array
(
[++i] => Array
(
[0] => 2002
)
[i++] => Array
(
[0] => 2002
)
)
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