gsp template render

gspRender

        def out = new org.codehaus.groovy.grails.web.pages.FastStringWriter()
        def test1Instance = new Test1(prop2: "This is gsp test") 
        long startTime = System.currentTimeMillis()
        def t=groovyPagesTemplateEngine.createTemplate(gspTemplateCode, 'gspTemplate')
        for (int i = 0; i < TIMES; i++) {
            t.make([test1Instance: test1Instance]).writeTo(out)
            out.flush()
            println "Executing... $i"
        }
        response.setContentType("text/json;charset=UTF-8")
        long timeTaken = System.currentTimeMillis() - startTime
        render '{"message":"' + TIMES + ' times completed in ' + timeTaken + 'ms."}'