diff --git a/perf/thread_lat.lua b/perf/thread_lat.lua
index 51de621..bceda2d 100644
--- a/perf/thread_lat.lua
+++ b/perf/thread_lat.lua
@@ -35,7 +35,6 @@ local time = socket.gettime
 
 local child_code = [[
 	local connect_to, message_size, roundtrip_count = ...
-	print("child:", ...)
 
 	local zmq = require"zmq"
 	local zthreads = require"zmq.threads"
diff --git a/perf/thread_push_pull.lua b/perf/thread_push_pull.lua
index d0ecab4..3ac6e2f 100644
--- a/perf/thread_push_pull.lua
+++ b/perf/thread_push_pull.lua
@@ -35,7 +35,6 @@ local time = socket.gettime
 
 local child_code = [[
 	local connect_to, message_size, message_count = ...
-	print("child:", ...)
 
 	local zmq = require"zmq"
 	local zthreads = require"zmq.threads"
diff --git a/perf/thread_thr.lua b/perf/thread_thr.lua
index 66abd51..e9a20dc 100644
--- a/perf/thread_thr.lua
+++ b/perf/thread_thr.lua
@@ -35,7 +35,6 @@ local time = socket.gettime
 
 local child_code = [[
 	local connect_to, message_size, message_count = ...
-	print("child:", ...)
 
 	local zmq = require"zmq"
 	local zthreads = require"zmq.threads"