(read_process_output): Only activate adaptive

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

diff --git a/src/process.c b/src/process.c
index 3cb63de1584400a0cd9f1101007ccac9cc33bfe9..315b31b728fc75dd5301c80f3043c0917b5daf77 100644 (file)
--- 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)