fdl_tl_cache.h File Reference

Bounded thread-local string cache with automatic eviction. More...

#include <string>
#include <unordered_map>
#include "fdl_constants.h"

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Data Structures
class	fdl::detail::TlStringCache< Key, Hash >
	Bounded thread-local string cache with auto-eviction. More...

Detailed Description

Bounded thread-local string cache with automatic eviction.

Provides a simple size-bounded wrapper around std::unordered_map that auto-clears when the entry count exceeds a threshold. This prevents unbounded memory growth in long-running threads that access many different documents or nodes.

The eviction strategy is a full clear (rather than LRU) because:

• Entries are only string caches, not correctness-critical data.
• The cost of repopulation is a single string copy per subsequent access.
• A full clear is cheaper than LRU bookkeeping for these small strings.