Cache db

[sajal]

What I did

• Ensure that self._db does not get overridden once its initialized.
• Increase disk cache size from 1 MB to 50 MB

How I did it

By only doing db initialization if _db attribute was not defined earlier

How to verify it

Ensure you have plyvel installed

rm -fvr ~/.cache/titanoboa/fork.db
pytest -s tests/integration/fork/test_abi_contract.py
pytest -s tests/integration/fork/test_abi_contract.py

The second run should take significantly less time. For me ~78s vs ~2s

Description for the changelog

• Fix caching behaviour in CachingRPC, fixes #205
• Increase disk cache to 50MB

Cute Animal Picture

[charles-cooper]

i'm investigating this bug and i'm reconsidering whether using leveldb is a good idea, since it does not behave nicely when accessed concurrently from multiple processes

[charles-cooper]

i'm investigating this bug and i'm reconsidering whether using leveldb is a good idea, since it does not behave nicely when accessed concurrently from multiple processes

ref: https://github.com/google/leveldb/blob/068d5ee1a3ac40dabd00d211d5013af44be55bea/doc/index.md#concurrency

[charles-cooper]

the LOCK exception should be fixed in 665676e72784e5616f612b92043c6a856e8ec53b and the behavior you observed with _db getting wiped after init should be fixed in f84bad9cd437132dec9a1f2c3dc7f007bfb5fb43