1 files changed, 3 insertions, 1 deletions

diff --git a/src/buffer.c b/src/buffer.c
index dbd5d2c..1b1b791 100644
--- a/src/buffer.c
+++ b/src/buffer.c
@@ -158,6 +158,7 @@ int buf_isempty(p_buf buf) {
 /*-------------------------------------------------------------------------*\
 * Sends a block of data (unbuffered)
 \*-------------------------------------------------------------------------*/
+#define STEPSIZE 8192
 static int sendraw(p_buf buf, const char *data, size_t count, size_t *sent) {
     p_io io = buf->io;
     p_tm tm = buf->tm;
@@ -165,7 +166,8 @@ static int sendraw(p_buf buf, const char *data, size_t count, size_t *sent) {
     int err = IO_DONE;
     while (total < count && err == IO_DONE) {
         size_t done;
-        err = io->send(io->ctx, data+total, count-total, &done, tm);
+        size_t step = (count-total <= STEPSIZE)? count-total: STEPSIZE;
+        err = io->send(io->ctx, data+total, step, &done, tm);
         total += done;
     }
     *sent = total;