feat: improve of performance of PHP variables registration (#94)

* feat: enhance php register variables

* apply comments

* fix errors

* improve benchmark

* remove debug statement

* use defer

* don't use defer in a loop

Co-authored-by: Kévin Dunglas <kevin@dunglas.fr>

Author: jockos

frankenphp.c

@@ -474,6 +474,14 @@ static char* frankenphp_read_cookies(void)
 	return ctx->cookie_data;
 }
 
+void frankenphp_register_bulk_variables(char **variables, size_t size, zval *track_vars_array)
+{
+	for (size_t i = 0; i < size; i++)
+	{
+		if (i%2 == 1) php_register_variable(variables[i-1], variables[i], track_vars_array);
+	}
+}
+
 static void frankenphp_register_variables(zval *track_vars_array)
 {
 	/* https://www.php.net/manual/en/reserved.variables.server.php */

frankenphp.go

@@ -444,18 +444,25 @@ func go_register_variables(rh C.uintptr_t, trackVarsArray *C.zval) {
 	r := cgo.Handle(rh).Value().(*http.Request)
 	env = r.Context().Value(contextKey).(*FrankenPHPContext).Env
 
-	// FIXME: remove this debug statement
-	env[fmt.Sprintf("REQUEST_%d", rh)] = "1"
+	le := len(env) * 2
+	cArr := (**C.char)(C.malloc(C.size_t(le) * C.size_t(unsafe.Sizeof((*C.char)(nil)))))
+	defer C.free(unsafe.Pointer(cArr))
 
-	// TODO: batch this for performance
+	variables := unsafe.Slice(cArr, le)
+
+	var i int
 	for k, v := range env {
-		ck := C.CString(k)
-		cv := C.CString(v)
+		variables[i] = C.CString(k)
+		i++
+
+		variables[i] = C.CString(v)
+		i++
+	}
 
-		C.php_register_variable(ck, cv, trackVarsArray)
+	C.frankenphp_register_bulk_variables(cArr, C.size_t(le), trackVarsArray)
 
-		C.free(unsafe.Pointer(ck))
-		C.free(unsafe.Pointer(cv))
+	for _, v := range variables {
+		C.free(unsafe.Pointer(v))
 	}
 }
 

frankenphp.h

@@ -2,6 +2,7 @@
 #define _FRANKENPPHP_H
 
 #include <stdint.h>
+#include <Zend/zend_types.h>
 
 int frankenphp_check_version();
 int frankenphp_init(int num_threads);
@@ -26,5 +27,6 @@ uintptr_t frankenphp_clean_server_context();
 int frankenphp_request_startup();
 int frankenphp_execute_script(const char *file_name);
 uintptr_t frankenphp_request_shutdown();
+void frankenphp_register_bulk_variables(char **variables, size_t size, zval *track_vars_array);
 
 #endif

frankenphp_test.go

@@ -88,6 +88,29 @@ func runTest(t *testing.T, test func(func(http.ResponseWriter, *http.Request), *
 	wg.Wait()
 }
 
+func BenchmarkHelloWorld(b *testing.B) {
+	if err := frankenphp.Init(frankenphp.WithLogger(zap.NewNop())); err != nil {
+		panic(err)
+	}
+	defer frankenphp.Shutdown()
+	cwd, _ := os.Getwd()
+	testDataDir := cwd + "/testdata/"
+
+	handler := func(w http.ResponseWriter, r *http.Request) {
+		req := frankenphp.NewRequestWithContext(r, testDataDir, nil)
+		if err := frankenphp.ServeHTTP(w, req); err != nil {
+			panic(err)
+		}
+	}
+
+	req := httptest.NewRequest("GET", "http://example.com/index.php", nil)
+	w := httptest.NewRecorder()
+
+	for i := 0; i < b.N; i++ {
+		handler(w, req)
+	}
+}
+
 func TestHelloWorld_module(t *testing.T) { testHelloWorld(t, nil) }
 func TestHelloWorld_worker(t *testing.T) { testHelloWorld(t, &testOptions{workerScript: "index.php"}) }
 func testHelloWorld(t *testing.T, opts *testOptions) {