seconds  |    consed   |  calls  |  sec/call  |  name
-----------------------------------------------------------
     1.233 |  19,183,304 |  97,294 |   0.000013 | IMAGE
     1.095 |   8,122,056 |  97,285 |   0.000011 | OFFSET
     1.012 |  62,808,984 |  55,894 |   0.000018 | RECT
     0.718 |  14,013,416 |  56,156 |   0.000013 | GET-INSTANCES-BY-VALUE
     0.603 |   6,208,360 |  27,738 |   0.000022 | UPDATE
     0.490 |   4,677,144 |  64,998 |   0.000008 | ELEVATION
     0.241 |   2,653,496 |  28,970 |   0.000008 | VELOC
     0.222 |   6,730,720 |       1 |   0.222339 | MAIN
     0.156 |   8,248,720 |       1 |   0.156000 | CREATE-DATABASE
     0.135 |   2,400,888 |  13,800 |   0.000010 | VISIBLE
     0.077 |     216,976 |  41,538 |   0.000002 | RENDER
     0.056 |   1,069,024 |  13,800 |   0.000004 | ACCEL
     0.049 |     581,072 |  41,747 |   0.000001 | SURFACE
     0.031 |   1,072,024 |       1 |   0.031000 | SETUP-REPL-STREAMS
     0.016 |      49,128 |       1 |   0.016000 | CLOSE-DATABASE
     0.016 |     957,280 |     208 |   0.000076 | GET-INSTANCE-BY-VALUE
     0.016 |     352,600 |     102 |   0.000155 | ENTER
     0.015 |     973,016 |       1 |   0.015000 | HANDLE-KEY-DOWN
     0.000 |           0 |       1 |   0.000000 | TITLE-CAPTION
     0.000 |           0 |     372 |   0.000000 | VELOC-X
     0.000 |           0 |     313 |   0.000000 | VELOC-Y
     0.000 |           0 |       1 |   0.000000 | USE-ROOT
     0.000 |       8,192 |  28,078 |   0.000000 | CHILDREN
     0.000 |           0 |       2 |   0.000000 | SIZE
     0.000 |      69,552 |     201 |   0.000000 | ACTIVE
     0.000 |       8,184 |     102 |   0.000000 | LEAVE
     0.000 |           0 |       1 |   0.000000 | EXIT
     0.000 |           0 |     478 |   0.000000 | ROOT
     0.000 |           0 |  84,319 |   0.000000 | Y
     0.000 |      16,352 |  84,429 |   0.000000 | X
     0.000 |           0 |     142 |   0.000000 | INPUT-MODE
     0.000 |           0 |       1 |   0.000000 | KEY-REPEAT
-----------------------------------------------------------
     6.182 | 140,420,488 | 737,975 |            | Total

estimated total profiling overhead: 0.58 seconds
overhead estimation parameters:
  0.0s/call, 7.8200003e-7s total profiling, 3.38e-7s internal profiling

Short description of the first several most expensive functions:
image: Slot read containing a persisted vector, which is then accessed.
offset: Slot read containing a complex number.
rect: Transient slot operation.
get-instances-by-value: From Elephant.
update: Iterates over objects with a certain slot value (after sorting them according to a second slot), and recursively calls update on each. Additional before and after methods may do several slot reads or writes.