Add a Conway’s-Game-of-Life example#14
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erikrose
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Hits the worker for every frame, which will perhaps be impressive.
…oard to 100x100. This lets us get boards over 44x44 to work in Viceroy, which has some URL-length limits.
erikrose
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28fps vs. 9 Other measurements, for posterity, on my M3 Max: 57fps: Flask, 44x44, compression 34fps: Viceroy, 44x44, compression 34fps Viceroy, 44x44, no compression The above 2 show compression doesn't have a speed effect. So we keep it in case network IO is slow. Or in case someone is on MS Edge, which has a 2048b URL-length limit. 40fps: Flask, 100x100, compression 9fps: Viceroy, 100x100, compression
erikrose
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| @app.route("/") | ||
| def root(): | ||
| return """<!DOCTYPE html> |
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Hmmm, I was considering options for moving this out to a separate file -- I wonder if it could be worthwile as a feature to have wasiless (or a separate step using wasi-virt) allow for doing fs virtualization and bundling a directory and its contents to some mount point in the image.
Python would use wasi fs but the virtualization layer would satisfy whatever it tried to access via its bundling.
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I would like to look into whether importlib.resources could be made to work reasonably with componenize-py. That would be the ultimate in Pythonicness.
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Experimenting with this. So far, it looks promising. componentize-py is happy to accept packages.
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No luck with the naive approach. The files in the package aren't around, and there's no automatic workaround. Even trying to read the __init__.py that's cited in a traceback reveals that it isn't really there. The results of resources.read_text("game_of_life", "__init__.py"):
[2025-10-29 15:45:16,944] ERROR in app: Exception on / [GET]
Traceback (most recent call last):
File "/2/flask/app.py", line 1511, in wsgi_app
File "/2/flask/app.py", line 919, in full_dispatch_request
File "/2/flask/app.py", line 917, in full_dispatch_request
File "/2/flask/app.py", line 902, in dispatch_request
File "/0/game_of_life/__init__.py", line 113, in root
File "/python/importlib/resources/_functional.py", line 32, in read_text
File "/python/pathlib/__init__.py", line 792, in read_text
File "/python/pathlib/__init__.py", line 776, in open
FileNotFoundError: [Errno 44] No such file or directory: '/0/game_of_life/__init__.py'
posborne
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posborne
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Game board state to evolve in the path seems a bit hard to deal with but has the obvious benefit of potentially giving us starting seeds of a sort we could use as examples.
I could see it being nice to have a later version of this allow for setting a fixed frame rate for more consistent animation with the option of going full beans.
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Thanks for the quick review! The framerate is actually capped at whatever the browser chooses to do, typically 60Hz. But sure, one could add a slider or what-have-you. |
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Putting game board state in the URL is mainly a nod to semantics: GET is conventionally cacheable, idempotent, not expected to mutate any state, etc. Unfortunately, it doesn't permit any request body, which is where I would rather have put the big board data! I experimented with PUT, which has weird base semantics for this case but the same idempotency, but I ran into (probably solveable) trouble with the JS API. Everything but Edge has plenty of URL space for the board at up to around 256x256, so I let it lie for now. |
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This shows off some of Fastly’s strengths w.r.t. Python in a plain visual way:
I imagine it's more representative of customer use cases than a heavy web app: quick computations that make a decision and ditch. Plus, blinkenlights!