toolhead: Reduce LOOKAHEAD_FLUSH_TIME to 0.150 seconds

The current code is likely to perform a lazy flush of the lookahead
queue around 4 times a second.  Increase that to around 6-7 times a
second.  This change may slightly improve the responsiveness to user
requests mid-print (eg, changing extrusion ratio) and may make a
"print stall" less likely in some corner cases.

Signed-off-by: Kevin O'Connor <[email protected]>

Author: KevinOConnor

klippy/toolhead.py

@@ -113,7 +113,7 @@ def set_junction(self, start_v2, cruise_v2, end_v2):
         self.cruise_t = cruise_d / cruise_v
         self.decel_t = decel_d / ((end_v + cruise_v) * 0.5)
 
-LOOKAHEAD_FLUSH_TIME = 0.250
+LOOKAHEAD_FLUSH_TIME = 0.150
 
 # Class to track a list of pending move requests and to facilitate
 # "look-ahead" across moves to reduce acceleration between moves.