Releases: tonsky/datascript
Releases · tonsky/datascript
1.3.3
1.3.2
1.3.1
1.3.0
New pull implementation
Pull has been a great API for a long time in Datomic and DataScript, with only one gotcha: it wasn’t performant. Up to the point where building pull tree manually using entities would outperform pull, even with all entities overhead. This seemed weird, because pull has much more information ahead of time, which could be leveraged for optimizations.
Well, you don’t have to compromise performance for convenience anymore. DataScript 1.3.0 features much faster pull implementation:
- Up to 7 times faster than old impl
- Up to 2,5 times faster than doing pull through entities
- Up to 4 times faster than Datomic in-memory
Numbers depend on particular database/pattern, so don’t trust them too much!
Also in new impl:
- Support :xform
- Cached parse results
- Fixed wildcard + recursion bug:
[* {:child ...}]did not work before - A callback to track all entities touched by pull (usable for reactive dependency tracking)
Also in 1.3.0
- Simplified benchmark code
- Ability to override query parse cache:
datascript.query/*query-cache*
Benchmark
Some raw numbers from built-in benchmark (ms per operation, lower is better).
Clojure:
| Benchmark | Entities | Old pull | New pull |
|---|---|---|---|
| pull-one | 0.6 | 2.5 | 0.5 |
| pull-many | 1.9 | 5.4 | 0.8 |
| pull-wildcard | n/a | n/a | 1.1 |
ClojureScript:
| Benchmark | Entities | Old pull | New pull |
|---|---|---|---|
| pull-one | 1.7 | 7.3 | 1.3 |
| pull-many | 5.2 | 15.1 | 2.2 |
| pull-wildcard | n/a | n/a | 2.8 |
Datomic in-memory:
| Benchmark | Entities | Pull |
|---|---|---|
| pull-one | 0.7 | 0.8 |
| pull-many | 2.3 | 2.5 |
| pull-wildcard | n/a | 4.7 |
