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[英]What does an associative array look like after HipHop PHP converts it to C++?
[英]What does the C++ output of the HipHop PHP compiler look like?
它是否足够干净,您可以放弃PHP并手动优化C ++代码?
简答: 不 。
由于我花了一些时间让HipHop工作,我决定在这里分享我的结果,所以我觉得完全没有浪费时间。
这是我的PHP输入:
<? class test { function loop() { for($i=0; $i<10; ++$i) { echo("i = $i\n"); } } } $t = new test(); $t->loop(); ?>
这是C ++输出......
#include <php/hello.h> #include <cpp/ext/ext.h> namespace HPHP { /////////////////////////////////////////////////////////////////////////////// /* preface starts */ /* preface finishes */ /* SRC: hello.php line 3 */ Variant c_test::os_get(const char *s, int64 hash) { return c_ObjectData::os_get(s, hash); } Variant &c_test::os_lval(const char *s, int64 hash) { return c_ObjectData::os_lval(s, hash); } void c_test::o_get(ArrayElementVec &props) const { c_ObjectData::o_get(props); } bool c_test::o_exists(CStrRef s, int64 hash) const { return c_ObjectData::o_exists(s, hash); } Variant c_test::o_get(CStrRef s, int64 hash) { return c_ObjectData::o_get(s, hash); } Variant c_test::o_set(CStrRef s, int64 hash, CVarRef v,bool forInit /* = false */) { return c_ObjectData::o_set(s, hash, v, forInit); } Variant &c_test::o_lval(CStrRef s, int64 hash) { return c_ObjectData::o_lval(s, hash); } Variant c_test::os_constant(const char *s) { return c_ObjectData::os_constant(s); } IMPLEMENT_CLASS(test) ObjectData *c_test::cloneImpl() { c_test *obj = NEW(c_test)(); cloneSet(obj); return obj; } void c_test::cloneSet(c_test *clone) { ObjectData::cloneSet(clone); } Variant c_test::o_invoke(const char *s, CArrRef params, int64 hash, bool fatal) { if (hash < 0) hash = hash_string_i(s); switch (hash & 1) { case 1: HASH_GUARD(0x0EA59CD1566F5709LL, loop) { return (t_loop(), null); } break; default: break; } return c_ObjectData::o_invoke(s, params, hash, fatal); } Variant c_test::o_invoke_few_args(const char *s, int64 hash, int count, CVarRef a0, CVarRef a1, CVarRef a2, CVarRef a3, CVarR ef a4, CVarRef a5) { if (hash < 0) hash = hash_string_i(s); switch (hash & 1) { case 1: HASH_GUARD(0x0EA59CD1566F5709LL, loop) { return (t_loop(), null); } break; default: break; } return c_ObjectData::o_invoke_few_args(s, hash, count, a0, a1, a2, a3, a4, a5); } Variant c_test::os_invoke(const char *c, const char *s, CArrRef params, int64 hash, bool fatal) { return c_ObjectData::os_invoke(c, s, params, hash, fatal); } Variant cw_test$os_get(const char *s) { return c_test::os_get(s, -1); } Variant &cw_test$os_lval(const char *s) { return c_test::os_lval(s, -1); } Variant cw_test$os_constant(const char *s) { return c_test::os_constant(s); } Variant cw_test$os_invoke(const char *c, const char *s, CArrRef params, bool fatal /* = true */) { return c_test::os_invoke(c, s, params, -1, fatal); } void c_test::init() { } /* SRC: hello.php line 4 */ void c_test::t_loop() { INSTANCE_METHOD_INJECTION(test, test::loop); int64 v_i = 0; { LOOP_COUNTER(1); for ((v_i = 0LL); less(v_i, 10LL); ++v_i) { LOOP_COUNTER_CHECK(1); { echo((LINE(6,concat3("i = ", toString(v_i), "\n")))); } } } } /* function */ Object co_test(CArrRef params, bool init /* = true */) { return Object(p_test(NEW(c_test)())->dynCreate(params, init)); } Variant pm_php$hello_php(bool incOnce /* = false */, LVariableTable* variables /* = NULL */) { FUNCTION_INJECTION(run_init::hello.php); { DECLARE_GLOBAL_VARIABLES(g); bool &alreadyRun = g->run_pm_php$hello_php; if (alreadyRun) { if (incOnce) return true;} else alreadyRun = true; if (!variables) variables = g; } DECLARE_GLOBAL_VARIABLES(g); LVariableTable *gVariables __attribute__((__unused__)) = get_variable_table(); Variant &v_t __attribute__((__unused__)) = (variables != gVariables) ? variables->get("t") : g->GV(t); (v_t = ((Object)(LINE(11,p_test(p_test(NEWOBJ(c_test)())->create()))))); LINE(12,v_t.o_invoke_few_args("loop", 0x0EA59CD1566F5709LL, 0)); return true; } /* function */ /////////////////////////////////////////////////////////////////////////////// }
呸! 我花了几秒钟甚至找到了循环......
>>“从头编写的C ++程序员编写的代码与PHP代码段(使用STL)几乎相同。”
从头开始编写的G-WAN ANSI C脚本程序员可以在下面编写(大大提高效率)代码:
static inline void loop(xbuf_t *reply)
{
int i = 0;
while(i < 10)
xbuf_xcat(reply, "i = %d\n", i++);
}
int main(int argc, char *argv[])
{
xbuf_t *reply = get_reply(argv);
loop(reply);
return 200;
}
好奇的人将对每个实施进行基准测试 真正好奇的将检查内存使用情况。
即使Lighttpd或Nginx使用本机预编译的C ++也比G-WAN的C脚本慢。
思想的食物......
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