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Merge #13241: scripted-diff: Avoid temporary copies when looping over std::map

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9b72c988a0 scripted-diff: Avoid temporary copies when looping over std::map (Ben Woosley)

Pull request description:

  The ::value_type of the std::map/std::multimap/std::unordered_map containers is
  std::pair<const Key, T>. Dropping the const results in an unnecessary copy,
  for example in C++11 range-based loops.

  For this I started with a more general scripted diff, then narrowed it down
  based on the inspection showing that all actual map/multimap/unordered_map
  variables used in loops start with m or have map in the name.

Tree-SHA512: b656d66b69ffa1eb954124aa8ae2bc5436ca50262abefa93bdda55cfcdaffc5ff90cd40539051a2bd06355ba69ddf245265cc8764eebff66d761b3aec06155a9
This commit is contained in:
MarcoFalke
2018-06-15 12:32:30 -04:00
parent 280924e672 9b72c988a0
commit be27048a18
5 changed files with 18 additions and 18 deletions
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4
src/validation.cpp
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@@ -3837,7 +3837,7 @@ bool CChainState::LoadBlockIndex(const Consensus::Params& consensus_params, CBlo
// Calculate nChainWork
std::vector<std::pair<int, CBlockIndex*> > vSortedByHeight;
vSortedByHeight.reserve(mapBlockIndex.size());
for (const std::pair<uint256, CBlockIndex*>& item : mapBlockIndex)
for (const std::pair<const uint256, CBlockIndex*>& item : mapBlockIndex)
{
CBlockIndex* pindex = item.second;
vSortedByHeight.push_back(std::make_pair(pindex->nHeight, pindex));
@@ -3904,7 +3904,7 @@ bool static LoadBlockIndexDB(const CChainParams& chainparams)
// Check presence of blk files
LogPrintf("Checking all blk files are present...\n");
std::set<int> setBlkDataFiles;
for (const std::pair<uint256, CBlockIndex*>& item : mapBlockIndex)
for (const std::pair<const uint256, CBlockIndex*>& item : mapBlockIndex)
{
CBlockIndex* pindex = item.second;
if (pindex->nStatus & BLOCK_HAVE_DATA) {