f5cdf2d6a8
This commit contains three classes of optimizations: - Reducing the number of unnecessary hash copies - Improve the performance of the DoubleSha256 function - A couple of minor optimizations of the ShaHash functions The first class is a result of the Bytes function on a ShaHash making a copy of the bytes before returning them. It really should have been named CloneBytes, but that would break the API now. To address this, a comment has been added to the function which explicitly calls out the copy behavior. In addition, all call sites of .Bytes on a ShaHash in the code base have been updated to simply slice the array when a copy is not needed. This saves a significant amount of data copying. The second optimization modifies the DoubleSha256 function to directly use fastsha256.Sum256 instead of the hasher interface. This reduces the number of allocations needed. A benchmark for the function has been added as well. old: BenchmarkDoubleSha256 500000 3691 ns/op 192 B/op 3 allocs/op new: BenchmarkDoubleSha256 500000 3081 ns/op 32 B/op 1 allocs/op The final optimizations are for the ShaHash IsEqual and SetBytes functions which have been modified to make use of the fact the type is an array and remove an unneeded subslice. |
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|---|---|---|
| .. | ||
| ldb | ||
| memdb | ||
| testdata | ||
| common_test.go | ||
| cov_report.sh | ||
| db.go | ||
| db_test.go | ||
| doc.go | ||
| example_test.go | ||
| interface_test.go | ||
| log.go | ||
| README.md | ||
| reorg_test.go | ||
database
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]
(https://travis-ci.org/btcsuite/btcd) ![ISC License]
(http://img.shields.io/badge/license-ISC-blue.svg)
Package database provides a database interface for the bitcoin block chain and transactions.
Please note that this package is intended to enable btcd to support different database backends and is not something that a client can directly access as only one entity can have the database open at a time (for most database backends), and that entity will be btcd.
When a client wants programmatic access to the data provided by btcd, they'll likely want to use the btcrpcclient package which makes use of the [JSON-RPC API] (https://github.com/btcsuite/btcd/tree/master/docs/json_rpc_api.md).
Documentation
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(http://godoc.org/github.com/btcsuite/btcd/database)
Full go doc style documentation for the project can be viewed online without
installing this package by using the GoDoc site
here.
You can also view the documentation locally once the package is installed with
the godoc tool by running godoc -http=":6060" and pointing your browser to
http://localhost:6060/pkg/github.com/btcsuite/btcd/database
Installation
$ go get github.com/btcsuite/btcd/database
Examples
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[CreateDB Example] (http://godoc.org/github.com/btcsuite/btcd/database#example-CreateDB)
Demonstrates creating a new database and inserting the genesis block into it. -
[NewestSha Example] (http://godoc.org/github.com/btcsuite/btcd/database#example-Db--NewestSha)
Demonstrates querying the database for the most recent best block height and hash.
TODO
- Increase test coverage to 100%
GPG Verification Key
All official release tags are signed by Conformal so users can ensure the code has not been tampered with and is coming from Conformal. To verify the signature perform the following:
-
Download the public key from the Conformal website at https://opensource.conformal.com/GIT-GPG-KEY-conformal.txt
-
Import the public key into your GPG keyring:
gpg --import GIT-GPG-KEY-conformal.txt -
Verify the release tag with the following command where
TAG_NAMEis a placeholder for the specific tag:git tag -v TAG_NAME
License
Package database is licensed under the copyfree ISC License.