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Hash table index for O(1) packet history lookups (#9499)

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* Use hash table for O(1) lookup of recently seen packets

* Eliminate a packet lookup during deduplication

* Infinite loop checks for find and remove

* Consolidate conditional compilation

* Exclude hash table from minimal build

* Additional comment on hash table capacity

* Unit tests for packet history changes

* Update incorrect comment about size clamp

Co-authored-by: Copilot <175728472+Copilot@users.noreply.github.com>

* Const

---------

Co-authored-by: Copilot <175728472+Copilot@users.noreply.github.com>
Co-authored-by: Ben Meadors <benmmeadors@gmail.com>
This commit is contained in:
Colby Dillion
2026-04-23 18:04:34 -05:00
committed by GitHub
co-authored by Copilot Ben Meadors
parent 837637b70c
commit 83a98c81f6
6 changed files with 1053 additions and 15 deletions
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src/meshUtils.h
+18
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@@ -11,6 +11,24 @@ template <class T> constexpr const T &clamp(const T &v, const T &lo, const T &hi
return (v < lo) ? lo : (hi < v) ? hi : v;
}
/// Return the smallest power of 2 >= n (undefined for n > 2^31)
static inline uint32_t nextPowerOf2(uint32_t n)
{
if (n <= 1)
return 1;
#if defined(__GNUC__)
return 1U << (32 - __builtin_clz(n - 1));
#else
n--;
n |= n >> 1;
n |= n >> 2;
n |= n >> 4;
n |= n >> 8;
n |= n >> 16;
return n + 1;
#endif
}
#if HAS_SCREEN
#define IF_SCREEN(X) \
if (screen) { \