└── README.md


/README.md:
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 1 | # JIT Graveyard
 2 | A list of dead JIT compiler projects for CPython.
 3 | 
 4 | > Those who fail to learn from history are doomed to repeat it.
 5 | 
 6 |   Sir Winston Churchill
 7 | 
 8 | ### Psyco
 9 | 
10 | An importable extension module that enabled some form of JIT of the eval loop calling
11 | CPython APIs. From the y2k Python 2.0 era. 32-bit x86 only. Python <= 2.6 only.
12 | 
13 | http://psyco.sourceforge.net/ _(yes, `http` without an `s` - "it's the 90s")_
14 | 
15 | The authors moved over to PyPy.
16 | 
17 | ### Unladen Swallow
18 | 
19 | Aimed to use LLVM to build a method-at-a-time JIT for CPython 2.6
20 | 
21 | https://code.google.com/archive/p/unladen-swallow/
22 | 
23 | The `--with-computed-gotos` performance boost came from the initial pre-llvm Unladen Swallow work.
24 | 
25 | ### Pyston version 1
26 | 
27 | Aimed to use LLVM to build a method-at-a-time JIT for CPython 2.6 (spot the similarity with Unladen Swallow)
28 | *and* re-implement the rest of the VM in C++.
29 | 
30 | https://github.com/pyston/pyston_v1/tree/v1.0
31 | 
32 | Note Pyston version 2 is a different project and still alive
33 | https://github.com/pyston/pyston
34 | 
35 | ### Skybison
36 | 
37 | Originally called Pyro, this was Instagram (now Meta)'s attempt at repeating history.
38 | 
39 | Re-implemented the VM in C++, including an interpreter written in assembly.
40 | 
41 | https://github.com/facebookexperimental/skybison
42 | 
43 | ### S6
44 | 
45 | 2022's addition to the Graveyard. From an Alphabet research subsidary.
46 | 
47 | https://github.com/deepmind/s6
48 | 
49 | 
50 | 


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