Try to set TCP send buffer using setsockpt()\&. Often OSes impose restrictions on the applications ability to set this value\&.
.RE
.PP
+recvfile = \fIBOOLEAN\fR (default: \fIno\fR) \fB(G)\fR
+.RS 4
+Whether to use splice() on Linux for receiving data\&.
+.RE
+.PP
+splice size = \fInumber\fR (default: \fI64k\fR) \fB(G)\fR
+.RS 4
+Maximum number of bytes spliced\&.
+.RE
+.PP
use sendfile = \fIBOOLEAN\fR (default: \fIyes\fR) \fB(G)\fR
.RS 4
Whether to use sendfile