我试图从这里对短代码进行基准测试，将其直接从javascript转换为PHP
Javascript：
(function() {
var a = 3.1415926, b = 2.718;
var i, j, d1, d2;
for(j=0; j<10; j++) {
for(i=0; i<100000000; i++) {
a = a + b;
}
}
console.log("a = " + a);
})();
.PHP：
<?php
$a = 3.1415926;
$b = 2.718;
for($j=0; $j<10; $j++) {
for($i=0; $i<100000000; $i++) {
$a = $a + $b;
}
}
echo "a = $a'n";
在控制台上运行两者(我的Macbook终端，节点v5.7.0与PHP 7.0.4(，结果非常令人费解：
$ time node test.js
a = 2717999973.76071
real 0m1.340s
user 0m0.912s
sys 0m0.021s
$ time php t.php
a = 2717999973.7607
real 2m40.239s
user 2m35.271s
sys 0m0.507s
基本数学运算中的 PHP 真的比节点慢 120 倍吗？有什么可以优化的吗？
这
虽然我无法解释javascript和PHP之间的巨大差异，但我已经能够在一个小的更改中使PHP代码的处理速度提高约30%。
在本地运行了一些测试后，我改变了
$a = $a + $b;
自
$a += $b;
运行时间为 53-55 秒，低于 78-80(在我的机器上 - i5 8GB RAM 和慢速磁盘(。 使用类似的节省估计值(四舍五入为 25%(应该总共需要大约 2 分钟的处理时间。 显然，这并不接近 JavaScript 时代。
根据您实际想要运行的内容(因为基准测试只能告诉您这么多(，您可以进行其他改进，但并不总是针对如此大的数字。
JavaScript 的编译比例接近 1：1，因此 10^9 个循环中没有太多的肉体，运行速度与 CPU 允许的速度一样快(这里：2.14 秒，使用旧节点，版本 v0.10.25(。
另一边的PHP做了很多事情，尤其是Zend机器。如果你用VLD转储你的小程序的操作码，你会得到(php 7.0.5(：
$ php -d vld.active=1 -d vld.execute=0 -f benchmark.php
Finding entry points
Branch analysis from position: 0
Jump found. Position 1 = 14
Branch analysis from position: 14
Jump found. Position 1 = 16, Position 2 = 4
Branch analysis from position: 16
Jump found. Position 1 = -2
Branch analysis from position: 4
Jump found. Position 1 = 10
Branch analysis from position: 10
Jump found. Position 1 = 12, Position 2 = 6
Branch analysis from position: 12
Jump found. Position 1 = 16, Position 2 = 4
Branch analysis from position: 16
Branch analysis from position: 4
Branch analysis from position: 6
Jump found. Position 1 = 12, Position 2 = 6
Branch analysis from position: 12
Branch analysis from position: 6
filename: benchmark.php
function name: (null)
number of ops: 21
compiled vars: !0 = $a, !1 = $b, !2 = $j, !3 = $i
line #* E I O op fetch ext return operands
-------------------------------------------------------------------------------------
2 0 E > ASSIGN !0, 3.14159
3 1 ASSIGN !1, 2.718
5 2 ASSIGN !2, 0
3 > JMP ->14
6 4 > ASSIGN !3, 0
5 > JMP ->10
7 6 > ADD ~8 !0, !1
7 ASSIGN !0, ~8
6 8 POST_INC ~10 !3
9 FREE ~10
10 > IS_SMALLER ~11 !3, 100000000
11 > JMPNZ ~11, ->6
5 12 > POST_INC ~12 !2
13 FREE ~12
14 > IS_SMALLER ~13 !2, 10
15 > JMPNZ ~13, ->4
10 16 > ROPE_INIT 3 ~15 'a+%3D+'
17 ROPE_ADD 1 ~15 ~15, !0
18 ROPE_END 2 ~14 ~15, '%0A'
19 ECHO ~14
20 > RETURN 1
branch: # 0; line: 2- 5; sop: 0; eop: 3; out1: 14
branch: # 4; line: 6- 6; sop: 4; eop: 5; out1: 10
branch: # 6; line: 7- 6; sop: 6; eop: 9; out1: 10
branch: # 10; line: 6- 6; sop: 10; eop: 11; out1: 12; out2: 6
branch: # 12; line: 5- 5; sop: 12; eop: 13; out1: 14
branch: # 14; line: 5- 5; sop: 14; eop: 15; out1: 16; out2: 4
branch: # 16; line: 10- 10; sop: 16; eop: 20; out1: -2
path #1: 0, 14, 16,
path #2: 0, 14, 4, 10, 12, 14, 16,
path #3: 0, 14, 4, 10, 6, 10, 12, 14, 16,
两个版本之间的区别是
1,10c1,10
< branch: # 0; line: 2- 5; sop: 0; eop: 3; out1: 14
< branch: # 4; line: 6- 6; sop: 4; eop: 5; out1: 10
< branch: # 6; line: 7- 6; sop: 6; eop: 9; out1: 10
< branch: # 10; line: 6- 6; sop: 10; eop: 11; out1: 12; out2: 6
< branch: # 12; line: 5- 5; sop: 12; eop: 13; out1: 14
< branch: # 14; line: 5- 5; sop: 14; eop: 15; out1: 16; out2: 4
< branch: # 16; line: 10- 10; sop: 16; eop: 20; out1: -2
< path #1: 0, 14, 16,
< path #2: 0, 14, 4, 10, 12, 14, 16,
< path #3: 0, 14, 4, 10, 6, 10, 12, 14, 16,
---
> branch: # 0; line: 2- 5; sop: 0; eop: 3; out1: 13
> branch: # 4; line: 6- 6; sop: 4; eop: 5; out1: 9
> branch: # 6; line: 7- 6; sop: 6; eop: 8; out1: 9
> branch: # 9; line: 6- 6; sop: 9; eop: 10; out1: 11; out2: 6
> branch: # 11; line: 5- 5; sop: 11; eop: 12; out1: 13
> branch: # 13; line: 5- 5; sop: 13; eop: 14; out1: 15; out2: 4
> branch: # 15; line: 10- 10; sop: 15; eop: 19; out1: -2
> path #1: 0, 13, 15,
> path #2: 0, 13, 4, 9, 11, 13, 15,
> path #3: 0, 13, 4, 9, 6, 9, 11, 13, 15,
它($a += $b(只是使用不同的，稍慢(！(的路径。是的，更慢：我的测试给出了 17 秒。 $a = $a + $b 秒和 20 秒。 $a += $b.不多，虽然很重要。而且与JavaScript也没有太大区别。
对于您的 PHP 版本来说，两分钟是相当大的，即使是旧的 PHP-5 在这里也能在 40 秒内完成。我在 ChangLogs 中找不到任何内容，但如果可能的话，您可以尝试更新。或者，如果您自己编译，请尝试不同的优化，因为MAC仍然与"普通"PC不同。