Summary: Adds `@functools.lru_cache` to `ts_to_dt` and `ts_to_date` which are used in `_make_rich_value` in Date/DateTime columns, i.e. every time such a column is accessed in a formula. I noticed that these operations are surprisingly expensive while working on https://phab.getgrist.com/D4075. This is just an easy way to potentially significantly speed up certain docs and formulas.
Test Plan:
Put this code in an engine test case:
```
def test_(self):
self.apply_user_action(["AddTable", "Table1", [
{"id": "A", "type": "DateTime:America/Chicago"},
]])
self.add_records("Table1", ["A"], [
[i] for i in range(1000)
])
formula = "for _ in range(1000): $A\nreturn 1"
import time
start = time.time()
self.add_column(
"Table1", formula, type="Any", isFormula=True, formula=formula
)
elapsed = time.time() - start
print(f"Took {elapsed:.2f} for formula {formula}")
```
The time goes from ~10s to ~1s. Similar tests showed no noticeable slowdown when caching had no effect.
Reviewers: dsagal
Reviewed By: dsagal
Differential Revision: https://phab.getgrist.com/D4099
Summary: This is https://phab.getgrist.com/D3205 plus some changes (https://github.com/dsagal/grist/compare/type-convert...type-convert-server?expand=1) that move the conversion process to the backend. A new user action ConvertFromColumn uses `call_external` so that the data engine can delegate back to ActiveDoc. Code for creating formatters and parsers is significantly refactored so that most of the logic is in `common` and can be used in different ways.
Test Plan: The original diff adds plenty of tests.
Reviewers: georgegevoian
Reviewed By: georgegevoian
Subscribers: dsagal
Differential Revision: https://phab.getgrist.com/D3240
Summary: Changes that move towards python 3 compatibility that are easy to review without much thought
Test Plan: The tests
Reviewers: dsagal
Reviewed By: dsagal
Differential Revision: https://phab.getgrist.com/D2873
Summary:
this moves sandbox/grist to core, and adds a requirements.txt
file for reconstructing the content of sandbox/thirdparty.
Test Plan:
existing tests pass.
Tested core functionality manually. Tested docker build manually.
Reviewers: dsagal
Reviewed By: dsagal
Differential Revision: https://phab.getgrist.com/D2563
