issue_comments: 1105642187
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| html_url | issue_url | id | node_id | user | created_at | updated_at | author_association | body | reactions | issue | performed_via_github_app |
|---|---|---|---|---|---|---|---|---|---|---|---|
| https://github.com/simonw/datasette/issues/1101#issuecomment-1105642187 | https://api.github.com/repos/simonw/datasette/issues/1101 | 1105642187 | IC_kwDOBm6k_c5B5sLL | 25778 | 2022-04-21T18:59:08Z | 2022-04-21T18:59:08Z | CONTRIBUTOR | Ha! That was your idea (and a good one). But it's probably worth measuring to see what overhead it adds. It did require both passing in the database and making the whole thing `async`. Just timing the queries themselves: 1. [Using `AsGeoJSON(geometry) as geometry`](https://alltheplaces-datasette.fly.dev/alltheplaces?sql=select%0D%0A++id%2C%0D%0A++properties%2C%0D%0A++AsGeoJSON%28geometry%29+as+geometry%2C%0D%0A++spider%0D%0Afrom%0D%0A++places%0D%0Aorder+by%0D%0A++id%0D%0Alimit%0D%0A++1000) takes 10.235 ms 2. [Leaving as binary](https://alltheplaces-datasette.fly.dev/alltheplaces?sql=select%0D%0A++id%2C%0D%0A++properties%2C%0D%0A++geometry%2C%0D%0A++spider%0D%0Afrom%0D%0A++places%0D%0Aorder+by%0D%0A++id%0D%0Alimit%0D%0A++1000) takes 8.63 ms Looking at the network panel: 1. Takes about 200 ms for the `fetch` request 2. Takes about 300 ms I'm not sure how best to time the GeoJSON generation, but it would be interesting to check. Maybe I'll write a plugin to add query times to response headers. The other thing to consider with async streaming is that it might be well-suited for a slower response. When I have to get the whole result and send a response in a fixed amount of time, I need the most efficient query possible. If I can hang onto a connection and get things one chunk at a time, maybe it's ok if there's some overhead. | {"total_count": 0, "+1": 0, "-1": 0, "laugh": 0, "hooray": 0, "confused": 0, "heart": 0, "rocket": 0, "eyes": 0} | 749283032 |