[gjs] Enable JIT if we can, by default

[James Willcox <jwillcox src gnome org>]

commit fca210e7bf2a4ca995de4f58db280e324e4af456
Author: James Willcox <jwillcox litl com>
Date:   Tue Dec 8 12:49:02 2009 -0500

    Enable JIT if we can, by default
    
    Setting the GJS_DISABLE_JIT environemnt variable will disable JIT always

 gjs/context.c |   14 +++++++++++---
 1 files changed, 11 insertions(+), 3 deletions(-)
---
diff --git a/gjs/context.c b/gjs/context.c
index eee03fe..ba9b459 100644
--- a/gjs/context.c
+++ b/gjs/context.c
@@ -427,6 +427,7 @@ gjs_context_constructor (GType                  type,
 {
     GObject *object;
     GjsContext *js_context;
+    guint32 options_flags;
 
     object = (* G_OBJECT_CLASS (gjs_context_parent_class)->constructor) (type,
                                                                          n_construct_properties,
@@ -456,10 +457,17 @@ gjs_context_constructor (GType                  type,
      *
      * JSOPTION_STRICT: Report warnings to error reporter function.
      */
+    options_flags = JSOPTION_DONT_REPORT_UNCAUGHT | JSOPTION_STRICT;
+
+#ifdef JSOPTION_JIT
+    if (!g_getenv("GJS_DISABLE_JIT")) {
+        gjs_debug(GJS_DEBUG_CONTEXT, "Enabling JIT");
+        options_flags |= JSOPTION_JIT;
+    }
+#endif
+
     JS_SetOptions(js_context->context,
-                  JS_GetOptions(js_context->context) |
-                  JSOPTION_DONT_REPORT_UNCAUGHT |
-                  JSOPTION_STRICT);
+                  JS_GetOptions(js_context->context) | options_flags);
 
     JS_SetLocaleCallbacks(js_context->context, &gjs_locale_callbacks);