java Profiler记录程序执行时间

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1、引入slf4j-ext

<dependency>

<groupId>org.slf4j</groupId>

<artifactId>slf4j-ext</artifactId>

<version>1.7.25</version>

</dependency>

2、在程序中埋点

@Override
protected void channelRead0(ChannelHandlerContext channelHandlerContext, FullHttpRequest fullHttpRequest) throws Exception {
    Profiler profiler = new Profiler("Timing profiler");
    profiler.start("handle request");
    LOG.info(fullHttpRequest.getUri());
    LOG.info(fullHttpRequest.getMethod().toString());
    profiler.start("handle response");
    FullHttpResponse response = new DefaultFullHttpResponse(HttpVersion.HTTP_1_1, HttpResponseStatus.OK);
    response.headers().set("content-Type", "text/html;charset=UTF-8");
    StringBuilder sb = new StringBuilder();
    sb.append("test");
    ByteBuf responseBuf = Unpooled.copiedBuffer(sb, CharsetUtil.UTF_8);
    response.content().writeBytes(responseBuf);
    responseBuf.release();
    profiler.start("write response");
    channelHandlerContext.writeAndFlush(response).addListener(ChannelFutureListener.CLOSE);
    profiler.stop();
    int spentMs = (int) profiler.elapsedTime() / 1000000;
    LOG.warn(profiler.toString());
    LOG.warn("Total Time is {}ms", spentMs);
}

3、查看打印出来的时间信息

22:05:35.921 [nioEventLoopGroup-3-2] WARN com.xueyou.demo.server.NettyHttpServerHandler - + Profiler [Timing profiler]

|-- elapsed time [handle request] 0.223 milliseconds.

|-- elapsed time [handle response] 1.492 milliseconds.

|-- elapsed time [write response] 36.974 milliseconds.

|-- Total [Timing profiler] 38.952 milliseconds.