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Reduce kmalloc() traffic in directory iteration.

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Pass the file name in a stack-allocated buffer instead of using an AK::String
when iterating directories. This dramatically reduces the amount of cycles
spent traversing the filesystem.
This commit is contained in:
Andreas Kling 2018-11-13 00:17:30 +01:00
parent 5e8e554f94
commit 19b9401487
10 changed files with 60 additions and 40 deletions
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2
VirtualFileSystem/FileDescriptor.cpp
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@ -218,7 +218,7 @@ ssize_t FileDescriptor::get_dir_entries(byte* buffer, Unix::size_t size)
m_vnode->vfs()->enumerateDirectoryInode(m_vnode->inode, [&stream] (auto& entry) {
stream << (dword)entry.inode.index();
stream << (byte)entry.fileType;
stream << (dword)entry.name.length();
stream << (dword)entry.name_length;
stream << entry.name;
return true;
});