After continuously profiling InitGensis with 100K accounts, it showed
pathologically slow code, that was the result of a couple of patterns:
* Unconditional and not always necessary map lookups
* O(n^2) sdk.AccAddressFromBech32 retrievals when the code is expensive,
during a quicksort
The remedy involved 4 parts:
* O(n) sdk.AccAddressFromBech32 invocations, down from O(n^2) in the quicksort
* Only doing map lookups when the domain key check has passed
* Using a black magic compiler technique of the map clearing idiom
* Zero allocation []byte<->string conversion
With 100K accounts, this brings InitGenesis down to ~6min, instead of
20+min, it reduces the sort code from ~7sec down to 50ms.
Also some simple benchmark reflect the change:
```shell
name old time/op new time/op delta
SanitizeBalances500-8 19.3ms ±10% 1.5ms ± 5% -92.46% (p=0.000 n=20+20)
SanitizeBalances1000-8 41.9ms ± 8% 3.0ms ±12% -92.92% (p=0.000 n=20+20)
name old alloc/op new alloc/op delta
SanitizeBalances500-8 9.05MB ± 6% 0.56MB ± 0% -93.76% (p=0.000 n=20+18)
SanitizeBalances1000-8 20.2MB ± 3% 1.1MB ± 0% -94.37% (p=0.000 n=20+19)
name old allocs/op new allocs/op delta
SanitizeBalances500-8 72.4k ± 6% 4.5k ± 0% -93.76% (p=0.000 n=20+20)
SanitizeBalances1000-8 162k ± 3% 9k ± 0% -94.40% (p=0.000 n=20+20)
```
The CPU profiles show the radical change as per
https://github.com/cosmos/cosmos-sdk/issues/7766#issuecomment-786671734
Later on, we shall do more profiling and fixes but for now this brings
down the run-time for InitGenesis.
Fixes#7766
Co-authored-by: Alessio Treglia <alessio@tendermint.com>
With this change, we'll get details on the number of
allocations performed by code. Later on when we have
continuous benchmarking infrastructure, this change
will prove useful to flag regressions.
Fixes#8459
Co-authored-by: Alessio Treglia <alessio@tendermint.com>
* enable the wsl linter
Fix various wsl-related warnings.
x/ibc/04-channel/keeper/handshake.go: fix missing return statement in ChanOpenTry().
* goimports -w files
* remove unknown linter references
* run make format
* Revert "run make format"
This reverts commit f810b62b9e4993f08506663d4e5f2ec2228a9863.
* run make format
* lint: various linting fixs
Signed-off-by: Marko Baricevic <marbar3778@yahoo.com>
* more linting
* more linting fixes
* more errchecking
* comment out errcheck for now
* undo error check
* address some comments
* remore require error
* change delete to batch delete
Co-authored-by: Alexander Bezobchuk <alexanderbez@users.noreply.github.com>
* Bump Tendermint version to v0.33.0
* Deprecate old cmn package with new packages
* Update update DB APIs
* More DB updates
* Bump IAVL to v0.13.0
* Handle error returned by iavl.NewMutableTree
* Fix some IAVL stuffs
* Update IAVL
* More updates
* Passing tests
* Fix unit tests
Co-authored-by: Jack Zampolin <jack.zampolin@gmail.com>
Emmanuel T Odeke
Robert Zaremba
Marko
Aaron Craelius
billy rennekamp
Adam Bozanich
Alexander Bezobchuk
Alessio Treglia
Joon