[lld] [ELF] Add BPSectionOrderer options (#120514) (PR #125559)

[Ellis Hoag via llvm-commits]

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@@ -98,10 +102,11 @@ static SmallVector<std::pair<unsigned, UtilityNodes>> getUnsForCompression(
     // Merge sections that are nearly identical
     SmallVector<std::pair<unsigned, SmallVector<uint64_t>>> newSectionHashes;
     DenseMap<uint64_t, unsigned> wholeHashToSectionIdx;
+    unsigned threshold = sectionHashes.size() > 10000 ? 5 : 0;
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ellishg wrote:

Yeah, 5 was picked because we saw good results for large binaries. If we wanted to generalize this we could compute something like the P90 of the hash frequency, which would be the set of hashes that are repeated more than 90% of the hashes. But I would like to experiment with this.

https://github.com/llvm/llvm-project/pull/125559