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cosmopolitan/tool/plinko
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Justine Tunney 73845be1f0 Restore zip.com and .symtab files 
This change restores the .symtab symbol table files in our flagship
programs (e.g. redbean.com, python.com) needed to show backtraces. This
also rolls back earlier changes to zip.com w.r.t. temp directories since
the right way to do it turned out to be the -b DIR flag.

This change also improves the performance of zip.com. It turned out
mmap() wasn't being used, because zip.com was assuming a 4096-byte
granularity, but cosmo requires 65536. There was also a chance to speed
up stdio scanning using the unlocked functions.
2022-08-21 00:17:20 -07:00
..
lib Clean up some code 2022-08-20 12:32:51 -07:00
plinko.c Clean up some code 2022-08-20 12:32:51 -07:00
plinko.mk Restore zip.com and .symtab files 2022-08-21 00:17:20 -07:00
README.txt WIP: Correct all typos (#498) 2022-07-20 14:01:15 -07:00

README.txt 

DESCRIPTION

  plinko is a simple lisp interpreter that takes advantage of advanced
  operating system features irrespective of their practicality such as
  using the nsa instruction popcount for mark sweep garbage collection
  overcommit memory, segment registers, and other dirty hacks that the
  popular interpreters cannot do; this lets plinko gain a considerable
  performance edge while retaining an event greater edge in simplicity

  We hope you find these sources informative, educational, and possibly
  useful too. Lisp source code, written in its dialect is included too
  under //tool/plinko/lib and unit tests which clarify their usage can
  be found in //test/tool/plinko.

BENCHMARK

  binary trees (n=21)

    - sbcl:     200 ms (native jit;  simulated arithmetic)
    - plinko:   400 ms (interpreted; simulated arithmetic)
    - python3:  800 ms (interpreted;    native arithmetic)
    - racket:  1200 ms (interpreted; simulated arithmetic)

AUTHOR

  Justine Alexandra Roberts Tunney <jtunney@gmail.com>

LICENSE

  ISC

SEE ALSO

  SectorLISP
  SectorLambda