FS-10496: [mod_v8] Speedup JavaScript. Enabling Code Caching.

conf/curl/autoload_configs/v8.conf.xml

 <configuration name="v8.conf" description="Google V8 JavaScript Plug-Ins">
   <settings>
+    <!-- <param name="script-caching" value="enabled"/> -->
+    <!-- <param name="cache-expires-sec" value="3600"/> -->
     <!-- <param name="startup-script" value="startup1.js"/> -->
     <!-- <param name="startup-script" value="startup2.js"/> -->
     <!-- <param name="xml-handler-script" value="directory.js"/> -->

conf/insideout/autoload_configs/v8.conf.xml

 <configuration name="v8.conf" description="Google V8 JavaScript Plug-Ins">
   <settings>
+    <!-- <param name="script-caching" value="enabled"/> -->
+    <!-- <param name="cache-expires-sec" value="3600"/> -->
     <!-- <param name="startup-script" value="startup1.js"/> -->
     <!-- <param name="startup-script" value="startup2.js"/> -->
     <!-- <param name="xml-handler-script" value="directory.js"/> -->

conf/vanilla/autoload_configs/v8.conf.xml

 <configuration name="v8.conf" description="Google V8 JavaScript Plug-Ins">
   <settings>
+    <!-- <param name="script-caching" value="enabled"/> -->
+    <!-- <param name="cache-expires-sec" value="3600"/> -->
     <!-- <param name="startup-script" value="startup1.js"/> -->
     <!-- <param name="startup-script" value="startup2.js"/> -->
     <!-- <param name="xml-handler-script" value="directory.js"/> -->

src/mod/languages/mod_v8/conf/autoload_configs/v8.conf.xml

 <configuration name="v8.conf" description="Google V8 JavaScript Plug-Ins">
   <settings>
+    <!-- <param name="script-caching" value="enabled"/> -->
+    <!-- <param name="cache-expires-sec" value="3600"/> -->
     <!-- <param name="startup-script" value="startup1.js"/> -->
     <!-- <param name="startup-script" value="startup2.js"/> -->
     <!-- <param name="xml-handler-script" value="directory.js"/> -->

src/mod/languages/mod_v8/mod_v8.h

@@ -36,6 +36,10 @@
 #include "javascript.hpp"
 #include <switch.h>
 
+#if defined(V8_MAJOR_VERSION) && V8_MAJOR_VERSION >=5
+void LoadScript(v8::MaybeLocal<v8::Script> *v8_script, v8::Isolate *isolate, const char *script_data, const char *script_file);
+#endif
+
 SWITCH_BEGIN_EXTERN_C
 
 #define JS_BUFFER_SIZE 1024 * 32

src/mod/languages/mod_v8/src/fsglobal.cpp

@@ -477,13 +477,20 @@ JS_GLOBAL_FUNCTION_IMPL_STATIC(Include)
 				string js_file = JSMain::LoadFileToString(script_name);
 
 				if (js_file.length() > 0) {
-					Handle<String> source = String::NewFromUtf8(info.GetIsolate(), js_file.c_str());
 #if defined(V8_MAJOR_VERSION) && V8_MAJOR_VERSION >=5
-					Handle<Script> script = Script::Compile(source, info[i]->ToString());
+					MaybeLocal<v8::Script> script;
+					LoadScript(&script, info.GetIsolate(), js_file.c_str(), script_name);
+					
+					if (script.IsEmpty()) {
+						info.GetReturnValue().Set(false);
+					} else {
+						info.GetReturnValue().Set(script.ToLocalChecked()->Run());
+					}
 #else
+					Handle<String> source = String::NewFromUtf8(info.GetIsolate(), js_file.c_str());
 					Handle<Script> script = Script::Compile(source, info[i]);
-#endif
 					info.GetReturnValue().Set(script->Run());
+#endif
 					switch_safe_free(path);
 					return;
 				}

src/mod/languages/mod_v8/src/jsmain.cpp

@@ -29,6 +29,9 @@
  */
 
 #include "javascript.hpp"
+#if defined(V8_MAJOR_VERSION) && V8_MAJOR_VERSION >=5
+#include "mod_v8.h"
+#endif
 
 #ifdef V8_ENABLE_DEBUGGING
 #include <v8-debug.h>
@@ -228,15 +231,21 @@ void JSMain::Include(const v8::FunctionCallbackInfo<Value>& args)
 		string js_file = LoadFileToString(js_safe_str(*str));
 
 		if (js_file.length() > 0) {
-			Handle<String> source = String::NewFromUtf8(args.GetIsolate(), js_file.c_str());
-
 #if defined(V8_MAJOR_VERSION) && V8_MAJOR_VERSION >=5
-			Handle<Script> script = Script::Compile(source, args[i]->ToString());
+			MaybeLocal<v8::Script> script;
+			LoadScript(&script, args.GetIsolate(), js_file.c_str(), js_safe_str(*str));
+
+			if (script.IsEmpty()) {
+				args.GetReturnValue().Set(false);
+			}
+			else {
+				args.GetReturnValue().Set(script.ToLocalChecked()->Run());
+			}
 #else
+			Handle<String> source = String::NewFromUtf8(args.GetIsolate(), js_file.c_str());
 			Handle<Script> script = Script::Compile(source, args[i]);
-#endif
-
 			args.GetReturnValue().Set(script->Run());
+#endif
 
 			return;
 		}
@@ -314,15 +323,16 @@ const string JSMain::ExecuteString(const string& scriptData, const string& fileN
 				inst->obj->RegisterInstance(isolate, inst->name, inst->auto_destroy);
 			}
 
-			// Create a string containing the JavaScript source code.
-			Handle<String> source = String::NewFromUtf8(isolate, scriptData.c_str());
-
 			TryCatch try_catch;
 
 			// Compile the source code.
 #if defined(V8_MAJOR_VERSION) && V8_MAJOR_VERSION >=5
-			Handle<Script> script = Script::Compile(source, String::NewFromUtf8(isolate, fileName.c_str()));
+			// Compile the source code.
+			MaybeLocal<v8::Script> script;
+			LoadScript(&script, isolate, scriptData.c_str(), fileName.c_str());
 #else
+			// Create a string containing the JavaScript source code.
+			Handle<String> source = String::NewFromUtf8(isolate, scriptData.c_str());
 			Handle<Script> script = Script::Compile(source, Local<Value>::New(isolate, String::NewFromUtf8(isolate, fileName.c_str())));
 #endif
 
@@ -330,8 +340,17 @@ const string JSMain::ExecuteString(const string& scriptData, const string& fileN
 				res = JSMain::GetExceptionInfo(isolate, &try_catch);
 				isError = true;
 			} else {
+#if defined(V8_MAJOR_VERSION) && V8_MAJOR_VERSION >=5
+				// Run the script
+				Handle<Value> result;
+
+				if (!script.IsEmpty()) {
+				    result = script.ToLocalChecked()->Run();
+				}
+#else
 				// Run the script
 				Handle<Value> result = script->Run();
+#endif
 				if (try_catch.HasCaught()) {
 					res = JSMain::GetExceptionInfo(isolate, &try_catch);
 					isError = true;