diff --git a/flow/scripts/open.tcl b/flow/scripts/open.tcl
index 4ef30068e4..0873afab98 100644
--- a/flow/scripts/open.tcl
+++ b/flow/scripts/open.tcl
@@ -5,18 +5,18 @@ source $::env(SCRIPTS_DIR)/read_liberty.tcl
 # Read def
 if {[env_var_exists_and_non_empty DEF_FILE]} {
     # Read lef
-    read_lef $::env(TECH_LEF)
-    read_lef $::env(SC_LEF)
+    log_cmd read_lef $::env(TECH_LEF)
+    log_cmd read_lef $::env(SC_LEF)
     if {[env_var_exists_and_non_empty ADDITIONAL_LEFS]} {
       foreach lef $::env(ADDITIONAL_LEFS) {
-        read_lef $lef
+        log_cmd read_lef $lef
       }
     }
     set input_file $::env(DEF_FILE)
-    read_def $input_file
+    log_cmd read_def $input_file
 } else {
     set input_file $::env(ODB_FILE)
-    read_db $input_file
+    log_cmd read_db $input_file
 }
 
 proc read_timing {input_file} {
@@ -27,7 +27,7 @@ proc read_timing {input_file} {
   if {$sdc_file == ""} {
     set sdc_file $::env(SDC_FILE)
   }
-  read_sdc $sdc_file
+  log_cmd read_sdc $sdc_file
   if [file exists $::env(PLATFORM_DIR)/derate.tcl] {
     source $::env(PLATFORM_DIR)/derate.tcl
   }
diff --git a/flow/scripts/util.tcl b/flow/scripts/util.tcl
index 1438b8ea07..ec6c2f6a34 100644
--- a/flow/scripts/util.tcl
+++ b/flow/scripts/util.tcl
@@ -1,7 +1,13 @@
 proc log_cmd {cmd args} {
   # log the command, escape arguments with spaces
-  puts "$cmd [join [lmap arg $args {expr {[string match {* *} $arg] ? "\"$arg\"" : $arg}}] " "]"
+  puts -nonewline "$cmd[join [lmap arg $args {expr {[string match {* *} $arg] ? " \"$arg\"" : " $arg"}}] ""]"
+  set start [clock seconds]
   $cmd {*}$args
+  set time [expr {[clock seconds] - $start}]
+  if {$time >= 5} {
+    puts -nonewline " ($time seconds)"
+  }
+  puts ""
 }
 
 proc fast_route {} {