https://github.com/samuelcolvin/cloudflare-worker-speed-test

https://github.com/samuelcolvin/cloudflare-worker-speed-test

Last synced: about 2 months ago
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• Host: GitHub
• URL: https://github.com/samuelcolvin/cloudflare-worker-speed-test
• Owner: samuelcolvin
• License: mit
• Created: 2020-07-12T12:34:53.000Z (about 4 years ago)
• Default Branch: master
• Last Pushed: 2023-01-20T22:42:47.000Z (over 1 year ago)
• Last Synced: 2024-05-02T04:41:49.191Z (5 months ago)
• Language: Rust
• Size: 48.8 KB
• Stars: 14
• Watchers: 2
• Forks: 2
• Open Issues: 3
• Metadata Files:
  • Readme: README.md
  • License: LICENSE

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README

        
# CloudFlare worker speed test

---

**Update**: after changes to how cloudflare compiles WebAssembly described 

[here](https://community.cloudflare.com/t/fixed-cloudflare-workers-slow-with-moderate-sized-webassembly-bindings/184668/16?u=samuelcolvin)

the performance of CloudFlare workers with large wasm modules has improved enormously.

For the largest case below the response time has dropped from **2844ms** to **211ms**.

---

See https://community.cloudflare.com/t/cloudflare-workers-very-slow-with-moderate-sized-webassembly-bindings/184668/12

This worker does one very simple thing: it substitutes the variable `{{ name }}` in a string and returns that string.

By default the template is `Hello, {{ name }}` and the value of name is `world`, both `template` and `name` can

be customised using `GET` parameters.

The substitution can be done in the the following ways:

* in javascript using `replace`

* in rust use string `replace`

* in rust using [regex](https://crates.io/crates/regex) `replace_all`

* in rust using [tera](https://crates.io/crates/tera) `one_off`

Using these means of substitution varies the wasm module from non existent, to small, medium and large.

## Performance results

| mode                                   | wasm size (kb) | mean response time (ms) | response stdev (ms) |

|----------------------------------------|----------------|-------------------------|---------------------|

| javascript                             |              0 |                      84 |                   8 |

| simple replace, wee_alloc              |             20 |                     127 |                  26 |

| simple replace, no wee_alloc           |             25 |                     133 |                  30 |

| regex, wee_alloc, default-features off |            193 |                     540 |                 235 |

| regex, wee_alloc                       |            619 |                    1228 |                 188 |

| tera, wee_alloc, default-features off  |           1160 |                    2744 |                 452 |

| tera, wee_alloc                        |           2546 |                    2844 |                 496 |

![results plot](https://github.com/samuelcolvin/cloudflare-worker-speed-test/blob/master/results.png?raw=true)

Results are calculated using `test_performance.py` script above, the worker is modified by switching features

in `Cargo.toml`, for the "javascript" case, `mode` has to be changed in `wrangler.toml` and some line commented and

uncommented in `worker/worker.js`.