如何在不超过分钟配额的情况下在googleappengine上使用Java?

//Request the user Agent info
String userAgent = req.getHeader("User-Agent");

我想知道什么是使用CPU最多,我使用谷歌帮助推荐。

    //The two lines below will get the CPU before requesting User-Agent Information
    QuotaService qs = QuotaServiceFactory.getQuotaService();
    long start = qs.getCpuTimeInMegaCycles();

    //Request the user Agent info
    String userAgent = req.getHeader("User-Agent");

    //The three lines below will get the CPU after requesting User-Agent Information 
    // and informed it to the application log.
    long end = qs.getCpuTimeInMegaCycles();
    double cpuSeconds = qs.convertMegacyclesToCpuSeconds(end - start);
    log.warning("CPU Seconds on geting User Agent: " + cpuSeconds);

上面的代码告诉我的唯一一件事是,检查报头将使用超过1秒(1000ms)的cpu时间,这对于Google来说是日志面板上的一个警告。这似乎是一个非常简单的请求,而且仍在使用超过一秒钟的cpu。

我错过了什么?

下面的日志图片供大家娱乐。

我张贴完整的代码,为大家的利益。

@SuppressWarnings("serial")
public class R2CComingSoonSiteServlet extends HttpServlet {

private static final Logger log = Logger.getLogger(R2CComingSoonSiteServlet.class.getName());

public void doGet(HttpServletRequest req, HttpServletResponse resp)
        throws IOException {
    //The two lines below will get the CPU before requesting User-Agent Information
    QuotaService qs = QuotaServiceFactory.getQuotaService();
    long start = qs.getCpuTimeInMegaCycles();

    //Request the user Agent info
    String userAgent = req.getHeader("User-Agent");

    //The three lines below will get the CPU after requesting User-Agent Information 
    // and informed it to the application log.
    long end = qs.getCpuTimeInMegaCycles();
    double cpuSeconds = qs.convertMegacyclesToCpuSeconds(end - start);
    log.warning("CPU Seconds on geting User Agent: " + cpuSeconds);

    userAgent = userAgent.toLowerCase();
    if(userAgent.contains("iphone"))
        resp.sendRedirect("/mobIndex.html");
    else
        resp.sendRedirect("/index.html");} }