This is SBCL 1.4.2, an implementation of ANSI Common Lisp.
More information about SBCL is available at <http://www.sbcl.org/>.

SBCL is free software, provided as is, with absolutely no warranty.
It is mostly in the public domain; some portions are provided under
BSD-style licenses.  See the CREDITS and COPYING files in the
distribution for more information.

WARNING: the Windows port is fragile, particularly for multithreaded
code.  Unfortunately, the development team currently lacks the time
and resources this platform demands.
* (lambda () (dotimes (i 1000000) (find 'z '(a b c z)))) (disassemble *)

#<FUNCTION (LAMBDA ()) {100285004B}>
*
; disassembly for (LAMBDA ())
; Size: 152 bytes. Origin: #x1002850087
; 087:       498B4C2460       MOV RCX, [R12+96]               ; no-arg-parsing entry point
                                                              ; thread.binding-stack-pointer
; 08C:       48894DF8         MOV [RBP-8], RCX
; 090:       84042500001020   TEST AL, [#x20100000]           ; safepoint
; 097:       4D31C9           XOR R9, R9
; 09A:       EB66             JMP L1
; 09C:       0F1F4000         NOP
; 0A0: L0:   4C8B0571FFFFFF   MOV R8, [RIP-143]               ; #<FUNCTION IDENTITY>
; 0A7:       488B0D72FFFFFF   MOV RCX, [RIP-142]              ; #<FUNCTION EQL>
; 0AE:       488D5C24F0       LEA RBX, [RSP-16]
; 0B3:       4883EC38         SUB RSP, 56
; 0B7:       488B156AFFFFFF   MOV RDX, [RIP-150]              ; 'Z
; 0BE:       488B3D6BFFFFFF   MOV RDI, [RIP-149]              ; '(A B C Z)
; 0C5:       BE17001120       MOV ESI, #x20110017             ; NIL
; 0CA:       48C743F000000000 MOV QWORD PTR [RBX-16], 0
; 0D2:       488973E8         MOV [RBX-24], RSI
; 0D6:       4C8943E0         MOV [RBX-32], R8
; 0DA:       48894BD8         MOV [RBX-40], RCX
; 0DE:       4C894DD0         MOV [RBP-48], R9
; 0E2:       488B054FFFFFFF   MOV RAX, [RIP-177]              ; #<SB-KERNEL:FDEFN SB-KERNEL:%FIND-POSITION>
; 0E9:       B90E000000       MOV ECX, 14
; 0EE:       48892B           MOV [RBX], RBP
; 0F1:       488BEB           MOV RBP, RBX
; 0F4:       FF5009           CALL QWORD PTR [RAX+9]
; 0F7:       4C8B4DD0         MOV R9, [RBP-48]
; 0FB:       498D4902         LEA RCX, [R9+2]
; 0FF:       4C8BC9           MOV R9, RCX
; 102: L1:   84042500001020   TEST AL, [#x20100000]           ; safepoint
; 109:       4981F980841E00   CMP R9, 2000000
; 110:       7C8E             JL L0
; 112:       BA17001120       MOV EDX, #x20110017             ; NIL
; 117:       488BE5           MOV RSP, RBP
; 11A:       F8               CLC
; 11B:       5D               POP RBP
; 11C:       C3               RET
; 11D:       CC10             BREAK 16                        ; Invalid argument count trap
NIL