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/dogsheep/healthkit-to-sqlite/issues/9#issuecomment-514745798,https://api.github.com/repos/dogsheep/healthkit-to-sqlite/issues/9,514745798,MDEyOklzc3VlQ29tbWVudDUxNDc0NTc5OA==,166463,tholo,2019-07-24T18:25:36Z,2019-07-24T18:25:36Z,NONE,"This is on macOS 10.14.6, with Python 3.7.4, packages in the virtual environment:

```
Package             Version
------------------- -------
aiofiles            0.4.0
Click               7.0
click-default-group 1.2.1
datasette           0.29.2
h11                 0.8.1
healthkit-to-sqlite 0.3.1
httptools           0.0.13
hupper              1.8.1
importlib-metadata  0.18
Jinja2              2.10.1
MarkupSafe          1.1.1
Pint                0.8.1
pip                 19.2.1
pluggy              0.12.0
setuptools          41.0.1
sqlite-utils        1.7
tabulate            0.8.3
uvicorn             0.8.4
uvloop              0.12.2
websockets          7.0
zipp                0.5.2
```","{""total_count"": 0, ""+1"": 0, ""-1"": 0, ""laugh"": 0, ""hooray"": 0, ""confused"": 0, ""heart"": 0, ""rocket"": 0, ""eyes"": 0}",472429048,Too many SQL variables,
https://github.com/simonw/sqlite-utils/issues/49#issuecomment-514509307,https://api.github.com/repos/simonw/sqlite-utils/issues/49,514509307,MDEyOklzc3VlQ29tbWVudDUxNDUwOTMwNw==,9599,simonw,2019-07-24T07:09:43Z,2019-07-24T07:10:21Z,OWNER,"This syntax should be shared with #42 as much as possible.

Maybe something based on a namedtuple would work, since those are already used in the library.

```python
workouts = db.table(""workouts"", extracts=[Extract(
    columns=[""source"", ""source_version""],
    table=""Sources""
)])
```
Since namedtuples cannot have default values this should probably be a class instead. Actually it looks like there is a trick for defaults here: https://stackoverflow.com/a/18348004","{""total_count"": 0, ""+1"": 0, ""-1"": 0, ""laugh"": 0, ""hooray"": 0, ""confused"": 0, ""heart"": 0, ""rocket"": 0, ""eyes"": 0}",472115381,extracts= should support multiple-column extracts,
https://github.com/dogsheep/healthkit-to-sqlite/issues/7#issuecomment-514500253,https://api.github.com/repos/dogsheep/healthkit-to-sqlite/issues/7,514500253,MDEyOklzc3VlQ29tbWVudDUxNDUwMDI1Mw==,9599,simonw,2019-07-24T06:34:28Z,2019-07-24T06:34:28Z,MEMBER,"Clearing the root element each time saved even more:

<img width=""1128"" alt=""Screen Shot 2019-07-24 at 8 30 38 AM"" src=""https://user-images.githubusercontent.com/9599/61770555-d3932100-aded-11e9-8ffe-bebd682f94ed.png"">
","{""total_count"": 2, ""+1"": 0, ""-1"": 0, ""laugh"": 0, ""hooray"": 2, ""confused"": 0, ""heart"": 0, ""rocket"": 0, ""eyes"": 0}",472097220,Script uses a lot of RAM,
https://github.com/dogsheep/healthkit-to-sqlite/issues/7#issuecomment-514498221,https://api.github.com/repos/dogsheep/healthkit-to-sqlite/issues/7,514498221,MDEyOklzc3VlQ29tbWVudDUxNDQ5ODIyMQ==,9599,simonw,2019-07-24T06:26:49Z,2019-07-24T06:26:49Z,MEMBER,"Adding `el.clear()` got me a huge improvement:

<img width=""1128"" alt=""Screen Shot 2019-07-24 at 8 23 26 AM"" src=""https://user-images.githubusercontent.com/9599/61770130-c3c70d00-adec-11e9-886a-93a2cea5bf4b.png"">
","{""total_count"": 0, ""+1"": 0, ""-1"": 0, ""laugh"": 0, ""hooray"": 0, ""confused"": 0, ""heart"": 0, ""rocket"": 0, ""eyes"": 0}",472097220,Script uses a lot of RAM,
https://github.com/dogsheep/healthkit-to-sqlite/issues/7#issuecomment-514496725,https://api.github.com/repos/dogsheep/healthkit-to-sqlite/issues/7,514496725,MDEyOklzc3VlQ29tbWVudDUxNDQ5NjcyNQ==,9599,simonw,2019-07-24T06:20:59Z,2019-07-24T06:20:59Z,MEMBER,"I'm using https://pypi.org/project/memory-profiler/ to explore this in more detail:

```
$ pip install memory-profiler matplotlib
```

Then:

```
$ mprof run healthkit-to-sqlite ~/Downloads/healthkit-export.zip healthkit.db
$ mprof plot
```

<img width=""1128"" alt=""Screen Shot 2019-07-24 at 8 17 06 AM"" src=""https://user-images.githubusercontent.com/9599/61769849-f3294a00-adeb-11e9-9026-02c24209530f.png"">
","{""total_count"": 0, ""+1"": 0, ""-1"": 0, ""laugh"": 0, ""hooray"": 0, ""confused"": 0, ""heart"": 0, ""rocket"": 0, ""eyes"": 0}",472097220,Script uses a lot of RAM,