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Reduce the number of syscalls in FileCache::loadMetadata

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This commit is contained in:
Raúl Marín 2023-07-21 17:08:01 +02:00
parent 234b5047b5
commit 3acb6005f0
1 changed files with 8 additions and 9 deletions
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17
src/Interpreters/Cache/FileCache.cpp
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@ -870,13 +870,12 @@ void FileCache::loadMetadata()
}
size_t total_size = 0;
for (auto key_prefix_it = fs::directory_iterator{metadata.getBaseDirectory()};
key_prefix_it != fs::directory_iterator();)
for (auto key_prefix_it = fs::directory_iterator{metadata.getBaseDirectory()}; key_prefix_it != fs::directory_iterator();
key_prefix_it++)
{
const fs::path key_prefix_directory = key_prefix_it->path();
key_prefix_it++;
if (!fs::is_directory(key_prefix_directory))
if (!key_prefix_it->is_directory())
{
if (key_prefix_directory.filename() != "status")
{
@ -887,19 +886,19 @@ void FileCache::loadMetadata()
continue;
}
if (fs::is_empty(key_prefix_directory))
fs::directory_iterator key_it{key_prefix_directory};
if (key_it == fs::directory_iterator{})
{
LOG_DEBUG(log, "Removing empty key prefix directory: {}", key_prefix_directory.string());
fs::remove(key_prefix_directory);
continue;
}
for (fs::directory_iterator key_it{key_prefix_directory}; key_it != fs::directory_iterator();)
for (/* key_it already initialized to verify emptiness */; key_it != fs::directory_iterator(); key_it++)
{
const fs::path key_directory = key_it->path();
++key_it;
if (!fs::is_directory(key_directory))
if (!key_it->is_directory())
{
LOG_DEBUG(
log,
@ -908,7 +907,7 @@ void FileCache::loadMetadata()
continue;
}
if (fs::is_empty(key_directory))
if (fs::directory_iterator{key_directory} == fs::directory_iterator{})
{
LOG_DEBUG(log, "Removing empty key directory: {}", key_directory.string());
fs::remove(key_directory);