diff options
| author | Max Kellermann <max@musicpd.org> | 2020-04-02 15:36:58 +0200 |
|---|---|---|
| committer | Max Kellermann <max@musicpd.org> | 2020-04-02 16:12:08 +0200 |
| commit | cdddaf21b006163fa771ab2a626925d5bbaa0eb9 (patch) | |
| tree | 9ee51e209c7ff2b4038f91ebe10ac567d1e3c776 /src/db | |
| parent | b267ba5f0a79817de1f1c52d5c3896cdb4a3f682 (diff) | |
db/simple/Directory: optimize GetName() using the parent's path
This method gets called a lot during MPD startup, via FindChild() and
directory_load_subdir(), so this is worth optimizing at the expense of
code readability.
This speeds up MPD startup by 10%.
Diffstat (limited to 'src/db')
| -rw-r--r-- | src/db/plugins/simple/Directory.cxx | 11 |
1 files changed, 10 insertions, 1 deletions
diff --git a/src/db/plugins/simple/Directory.cxx b/src/db/plugins/simple/Directory.cxx index 27602afc2..66aa6cd48 100644 --- a/src/db/plugins/simple/Directory.cxx +++ b/src/db/plugins/simple/Directory.cxx @@ -32,6 +32,7 @@ #include "fs/Traits.hxx" #include "util/Alloc.hxx" #include "util/DeleteDisposer.hxx" +#include "util/StringCompare.hxx" #include <assert.h> #include <string.h> @@ -69,7 +70,15 @@ Directory::GetName() const noexcept { assert(!IsRoot()); - return PathTraitsUTF8::GetBase(path.c_str()); + if (parent->IsRoot()) + return path.c_str(); + + assert(StringAfterPrefix(path.c_str(), parent->path.c_str()) != nullptr); + assert(*StringAfterPrefix(path.c_str(), parent->path.c_str()) == PathTraitsUTF8::SEPARATOR); + + /* strip the parent directory path and the slash separator + from this directory's path, and the base name remains */ + return path.c_str() + parent->path.length() + 1; } Directory * |