(read_process_output): Only activate adaptive

buffering if we read less than 256 bytes at a time.

1 files changed, 2 insertions, 2 deletions

diff --git a/src/process.c b/src/process.c
index 3cb63de1584..315b31b728f 100644
--- a/src/process.c
+++ b/src/process.c
@@ -4771,7 +4771,7 @@ read_process_output (proc, channel)
       if (!NILP (p->adaptive_read_buffering))
         {
           int delay = XINT (p->read_output_delay);
-          if (nbytes < readmax - carryover)
+          if (nbytes < 256)
             {
               if (delay < READ_OUTPUT_DELAY_MAX_MAX)
                 {
@@ -4780,7 +4780,7 @@ read_process_output (proc, channel)
                   delay += READ_OUTPUT_DELAY_INCREMENT * 2;
                 }
             }
-          else if (delay > 0)
+          else if (delay > 0 && (nbytes == readmax - carryover))
             {
               delay -= READ_OUTPUT_DELAY_INCREMENT;
               if (delay == 0)