This PR adds an addtional API called `NewBatchWithSize` for db
batcher. It turns out that leveldb batch memory allocation is
super inefficient. The main reason is the allocation step of
leveldb Batch is too small when the batch size is large. It can
take a few second to build a leveldb batch with 100MB size.
Luckily, leveldb also offers another API called MakeBatch which can
pre-allocate the memory area. So if the approximate size of batch is
known in advance, this API can be used in this case.
It's needed in new state scheme PR which needs to commit a batch of
trie nodes in a single batch. Implement the feature in a seperate PR.
* crypto/bn256: fix bn256Mul fuzzer to not hang on large input
* Update crypto/bn256/bn256_fuzz.go
Co-authored-by: ligi <ligi@ligi.de>
Co-authored-by: ligi <ligi@ligi.de>
* crypto/bn256: full switchover to cloudflare's code
* crypto/bn256: only use cloudflare for optimized architectures
* crypto/bn256: upstream fallback for non-optimized code
* .travis, build: drop support for Go 1.8 (need type aliases)
* crypto/bn256/cloudflare: enable curve mul lattice optimization
rjl493456442
Gautam Botrel
Marius van der Wijden
Martin Holst Swende
Péter Szilágyi