What follows is several sets of equivalent code (both in MOO and in Cold), called five seperate times with the profiling times averaged. This code was evaluated using the eval command in both LambdaMOO Core and ColdCore. The granularity provided with the ColdCore is in microseconds, which is why it is more defined. Time and tick counters were wrapped around each code segment to get the resulting numbers. More details about the execution environment is given at the end of this document.

Forced task preempting:

Cold:

var x;
for x in [1 .. 100000]
  pause();

for x in [1 .. 100000]
  suspend(0);
endfor

Task preempting only when needed:

Cold:

var x;
for x in [1 .. 100000]
  refresh();

for x in [1 .. 100000]
  $command_utils:suspend_if_needed(0);
endfor

Random string manipulation and i/o print:

Cold:

var x, str, line;

line="this is a test of foo, do something or dont because foo will conquer all";
for x in [1 .. 1000] {
  for str in (line.explode())
    if (str.match_regexp("^foo"))
      .tell("Yup");
  refresh();
}

line="this is a test of foo, do something or dont because foo will conquer all";
for x in [1 .. 1000]
  for str in ($string_utils:explode(line))
    if (match(str, "^foo"))
      player:tell("Yup");
    endif
    $command_utils:suspend_if_needed(0);
  endfor
endfor

All tests were run on a p150+ Cyrix system running FreeBSD 2.1-STABLE. This server also runs a web server with secure sockets. Both the Cold Core and the MOO Core were running at the same time as the test. The Cold Core had five people connected at the time of the test. The MOO had one person connected at the time of the test. Both were relatively idle, other than when the tests were run. The tests were not run on both systems at the same time. Snap shots of their execution (taken with 'ps') are (MOO is the first three, Cold Core is the last one):

USER       PID %CPU %MEM   VSZ  RSS  TT  STAT STARTED       TIME COMMAND
brandon  18611  0.0 37.6  6008 5324  p1  S+    4:08PM    0:06.92 moo LambdaCore
brandon  18613  0.0  0.7   380   88  p1  I+    4:08PM    0:00.01 (MOO name-look
brandon  18615  0.0  0.6   380   72  p1  I+    4:08PM    0:00.00 (MOO name-look

brandon  11534  0.0 14.2  3464 2008  p0- S    Thu10PM    9:08.24 /cold/genesis