html_url,issue_url,id,node_id,user,user_label,created_at,updated_at,author_association,body,reactions,issue,issue_label,performed_via_github_app https://github.com/simonw/datasette/issues/859#issuecomment-647194131,https://api.github.com/repos/simonw/datasette/issues/859,647194131,MDEyOklzc3VlQ29tbWVudDY0NzE5NDEzMQ==,3243482,abdusco,2020-06-21T23:15:54Z,2020-06-21T23:26:09Z,CONTRIBUTOR,"I'm not sure if table counts are to blame. There shouldn't be a ~3 orders of magnitude difference. ```fish user@klein /a/w/scrapyard (master)> set sql ""select count(*) from table_1; select count(*) from table_2; select count(*) from table_3;"" user@klein /a/w/scrapyard (master)> time sqlite3 scrapyard.db ""$sql"" 187489 46492 2229 ________________________________________________________ Executed in 25.57 millis fish external usr time 3.55 millis 0.00 micros 3.55 millis sys time 22.42 millis 1123.00 micros 21.30 millis ``` but not letting datasette count the tables definitely helps.","{""total_count"": 0, ""+1"": 0, ""-1"": 0, ""laugh"": 0, ""hooray"": 0, ""confused"": 0, ""heart"": 0, ""rocket"": 0, ""eyes"": 0}",642572841,Database page loads too slowly with many large tables (due to table counts), https://github.com/simonw/datasette/issues/859#issuecomment-647189948,https://api.github.com/repos/simonw/datasette/issues/859,647189948,MDEyOklzc3VlQ29tbWVudDY0NzE4OTk0OA==,9599,simonw,2020-06-21T22:30:12Z,2020-06-21T22:30:43Z,OWNER,"I'll write a little script which generates a 300MB SQLite file with a bunch of tables with lots of randomly generated rows in to help test this. Having a tool like that which can generate larger databases with different gnarly performance characteristics will be useful for other performance work too.","{""total_count"": 0, ""+1"": 0, ""-1"": 0, ""laugh"": 0, ""hooray"": 0, ""confused"": 0, ""heart"": 0, ""rocket"": 0, ""eyes"": 0}",642572841,Database page loads too slowly with many large tables (due to table counts), https://github.com/simonw/datasette/issues/859#issuecomment-647189666,https://api.github.com/repos/simonw/datasette/issues/859,647189666,MDEyOklzc3VlQ29tbWVudDY0NzE4OTY2Ng==,9599,simonw,2020-06-21T22:26:55Z,2020-06-21T22:26:55Z,OWNER,"This makes a lot of sense. I implemented the mechanism for the index page because I have my own instance of Datasette that was running slow, but it had a dozen database files attached to it. I've not run into this with a single giant database file but it absolutely makes sense that the same optimization would be necessary for the database page there too.","{""total_count"": 0, ""+1"": 0, ""-1"": 0, ""laugh"": 0, ""hooray"": 0, ""confused"": 0, ""heart"": 0, ""rocket"": 0, ""eyes"": 0}",642572841,Database page loads too slowly with many large tables (due to table counts), https://github.com/simonw/datasette/issues/859#issuecomment-647135713,https://api.github.com/repos/simonw/datasette/issues/859,647135713,MDEyOklzc3VlQ29tbWVudDY0NzEzNTcxMw==,3243482,abdusco,2020-06-21T14:30:02Z,2020-06-21T14:30:02Z,CONTRIBUTOR,"Oops, the same method is called from both index and database pages. But removing select count queries speed up the page load quite a bit.","{""total_count"": 0, ""+1"": 0, ""-1"": 0, ""laugh"": 0, ""hooray"": 0, ""confused"": 0, ""heart"": 0, ""rocket"": 0, ""eyes"": 0}",642572841,Database page loads too slowly with many large tables (due to table counts),