a-lunev commented on a change in pull request #5239:
URL: https://github.com/apache/incubator-nuttx/pull/5239#discussion_r785471450



##########
File path: net/tcp/tcp_sendfile.c
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@@ -495,6 +495,9 @@ ssize_t tcp_sendfile(FAR struct socket *psock, FAR struct 
file *infile,
    */
 
   net_lock();
+#ifdef CONFIG_NET_TCP_WRITE_BUFFERS
+  conn->sendfile = true;

Review comment:
       > 2\. Also I have almost prepared the next patch that fixes another 
issue in tcp_sendfile (+ code optimization), and at the same time the TCP 
payload throughput of tcp_sendfile is increased from 234 Mbits/s up to about 
432 Mbit/s (sim:tcpblaster config on my Linux setup).
   
   I created PR #5242.




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