sax，script包在android中的效率


		
	 

	调试模式下的SAX和script

	效率巨慢，而运行模式下，好很多，大概快5-10倍。

	 

	另外script包会编译一个print方法，这个过程耗时很多，严重影响效率

	去掉并做些优化后

	500条脚本，执行从1s缩减到200ms

	 

	代码精简如下：

	 

	RhinoScriptEngine.java

	    Scriptable getRuntimeScope(ScriptContext ctxt) {

	        if (ctxt == null) {

	            throw new NullPointerException("null script context");

	        }

	 

	        // we create a scope for the given ScriptContext

	        Scriptable newScope = new ExternalScriptable(ctxt, indexedProps);

	 

	        // Set the prototype of newScope to be 'topLevel' so that

	        // JavaScript standard objects are visible from the scope.

	        newScope.setPrototype(topLevel);

	 

	        // define "context" variable in the new scope

	        newScope.put("context", newScope, ctxt);

	 

	        // define "print", "println" functions in the new scope

	        //去掉下面几行

	//        Context cx = enterContext();

	//        try {

	//            cx.evaluateString(newScope, printSource, "print", 1, null);

	//        } finally {

	//            cx.exit();

	//        }

	        return newScope;

	    }

补充：移动开发 , Android ,