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Improve levelDB performance by eliminating GetHex calls and allocate/copy/free cycles.

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Sorry, this invalidates existing levelDB databases. Please remove them.
This commit is contained in:
JoelKatz
2013-04-26 13:53:26 -07:00
parent 1605a74864
commit d508bba147
2 changed files with 21 additions and 17 deletions
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35
src/cpp/ripple/HashedObject.cpp
View File

@@ -50,13 +50,17 @@ bool HashedObjectStore::store(HashedObjectType type, uint32 index,
HashedObject::pointer object = boost::make_shared<HashedObject>(type, index, data, hash);
if (!mCache.canonicalize(hash, object))
{
Serializer s(9 + data.size());
s.add8(static_cast<unsigned char>(type));
s.add32(index);
s.add32(index);
s.addRaw(data);
leveldb::Status st = theApp->getHashNodeDB()->Put(leveldb::WriteOptions(), hash.GetHex(),
leveldb::Slice(reinterpret_cast<const char *>(s.getDataPtr()), s.getLength()));
std::vector<unsigned char> rawData(9 + data.size());
unsigned char* bufPtr = &rawData.front();
*reinterpret_cast<uint32*>(bufPtr + 0) = ntohl(index);
*reinterpret_cast<uint32*>(bufPtr + 4) = ntohl(index);
*(bufPtr + 8) = static_cast<unsigned char>(type);
memcpy(bufPtr + 9, &data.front(), data.size());
leveldb::Status st = theApp->getHashNodeDB()->Put(leveldb::WriteOptions(),
leveldb::Slice(reinterpret_cast<const char *>(hash.begin()), hash.size()),
leveldb::Slice(reinterpret_cast<const char *>(bufPtr), 9 + data.size()));
if (!st.ok())
{
cLog(lsFATAL) << "Failed to store hash node";
@@ -85,23 +89,20 @@ HashedObject::pointer HashedObjectStore::retrieve(const uint256& hash)
}
std::string sData;
leveldb::Status st = theApp->getHashNodeDB()->Get(leveldb::ReadOptions(), hash.GetHex(), &sData);
leveldb::Status st = theApp->getHashNodeDB()->Get(leveldb::ReadOptions(),
leveldb::Slice(reinterpret_cast<const char *>(hash.begin()), hash.size()), &sData);
if (!st.ok())
{
assert(st.IsNotFound());
return obj;
}
Serializer s(sData);
const unsigned char* bufPtr = reinterpret_cast<const unsigned char*>(&sData.front());
uint32 index = htonl(*reinterpret_cast<const uint32*>(bufPtr));
int htype = bufPtr[8];
int htype;
uint32 index;
std::vector<unsigned char> data;
s.get8(htype, 0);
s.get32(index, 1);
s.getRaw(data, 9, s.getLength() - 9);
obj = boost::make_shared<HashedObject>(static_cast<HashedObjectType>(htype), index, data, hash);
obj = boost::make_shared<HashedObject>(static_cast<HashedObjectType>(htype), index,
bufPtr + 9, sData.size() - 9, hash);
mCache.canonicalize(hash, obj);
cLog(lsTRACE) << "HOS: " << hash << " fetch: in db";

3
src/cpp/ripple/HashedObject.h
View File

@@ -37,6 +37,9 @@ public:
HashedObject(HashedObjectType type, uint32 index, const std::vector<unsigned char>& data, const uint256& hash) :
mType(type), mHash(hash), mLedgerIndex(index), mData(data) { ; }
HashedObject(HashedObjectType type, uint32 index, const unsigned char *data, int dlen, const uint256& hash) :
mType(type), mHash(hash), mLedgerIndex(index), mData(data, data + dlen) { ; }
const std::vector<unsigned char>& getData() const { return mData; }
const uint256& getHash() const { return mHash; }
HashedObjectType getType() const { return mType; }