diff --git a/greenhouse/emulation/os.py b/greenhouse/emulation/os.py
index <HASH>..<HASH> 100644
--- a/greenhouse/emulation/os.py
+++ b/greenhouse/emulation/os.py
@@ -9,7 +9,7 @@ import sys
 from .. import io, scheduler
 
 
-OS_TIMEOUT = 0.001
+OS_TIMEOUT = 0.01
 
 
 def nonblocking_fd(fd):
slow down the polling of waitpid() and friends

this was taking a few %-worth of CPU just for the waiting, that's too
much and I suppose <I>ms is fine-grained enough