Sourced from github.com/puzpuzpuz/xsync/v3's releases.

v3.3.1

• Add NewMapOfWithHasher function #137

Adds NewMapOfWithHasher function to support custom hash functions in MapOf:

m := NewMapOfWithHasher[int, int](https://github.com/puzpuzpuz/xsync/blob/HEAD/func(i int, _ uint64) uint64 {
	// Murmur3 finalizer. No DDOS protection as it does not support seed.
	h := uint64(i)
	h = (h ^ (h >> 33)) * 0xff51afd7ed558ccd
	h = (h ^ (h >> 33)) * 0xc4ceb9fe1a85ec53
	return h ^ (h >> 33)
})

Some custom hash functions may be faster than the built-in function if the lack of DDOS protection is fine.

Murmur3 finalizer:

BenchmarkMapOfInt_Murmur3Finalizer_WarmUp/reads=100%-8         	525864650	         2.240 ns/op	 446360938 ops/s	       0 B/op	       0 allocs/op
BenchmarkMapOfInt_Murmur3Finalizer_WarmUp/reads=99%-8          	383333918	         3.127 ns/op	 319827294 ops/s	       0 B/op	       0 allocs/op
BenchmarkMapOfInt_Murmur3Finalizer_WarmUp/reads=90%-8          	267635385	         4.535 ns/op	 220506863 ops/s	       0 B/op	       0 allocs/op
BenchmarkMapOfInt_Murmur3Finalizer_WarmUp/reads=75%-8          	181292007	         6.448 ns/op	 155092697 ops/s	       2 B/op	       0 allocs/op

Built-in hash function:

BenchmarkMapOfInt_WarmUp/reads=100%-8         	431097415	         2.858 ns/op	 349837551 ops/s	       0 B/op	       0 allocs/op
BenchmarkMapOfInt_WarmUp/reads=99%-8          	307244330	         3.951 ns/op	 253072903 ops/s	       0 B/op	       0 allocs/op
BenchmarkMapOfInt_WarmUp/reads=90%-8          	226392990	         5.306 ns/op	 188477583 ops/s	       0 B/op	       0 allocs/op
BenchmarkMapOfInt_WarmUp/reads=75%-8          	159236962	         7.513 ns/op	 133108546 ops/s	       2 B/op	       0 allocs/op

v3.3.0

• Speed up MapOf lookups #134
• Expose Map/MapOf statistics #133
• Change license to Apache License 2.0 #135

Introduces meta memory and SWAR-based lookups similar to C++'s absl::flat_hash_map hash table (https://abseil.io/docs/cpp/guides/container). The lookups are now up to 30% faster.

Also, reduces MapOf's memory overhead: each bucket now holds up to 5 entries instead of 3.

Map/MapOf statistics are available via m.Stats(). They may be used for diagnostic purposes.

v3.2.0

• Introduce Map/MapOf configs and grow-only option (#132)

Adds options support to the NewMap/NewMapOf functions. A MapOf can now be created like this:

m := xsync.NewMapOf[int, int](https://github.com/puzpuzpuz/xsync/blob/HEAD/WithPresize(100))

... (truncated)

• e96db0e Add NewMapOfWithHasher function (#137)
• 55a8a3a Improve readme (#136)
• 2470ff8 Change license to Apache License 2.0 (#135)
• 9d42f97 Speed up MapOf lookups (#134)
• 6092349 Expose Map/MapOf statistics (#133)
• ec68f42 Introduce Map/MapOf configs and grow-only option (#132)
• cbe4ec1 Improve NewMapPresized/NewMapOfPresized godoc (#122)
• See full diff in compare view

You can trigger Dependabot actions by commenting on this PR:

• @dependabot rebase will rebase this PR
• @dependabot recreate will recreate this PR, overwriting any edits that have been made to it
• @dependabot merge will merge this PR after your CI passes on it
• @dependabot squash and merge will squash and merge this PR after your CI passes on it
• @dependabot cancel merge will cancel a previously requested merge and block automerging
• @dependabot reopen will reopen this PR if it is closed
• @dependabot close will close this PR and stop Dependabot recreating it. You can achieve the same result by closing it manually
• @dependabot show <dependency name> ignore conditions will show all of the ignore conditions of the specified dependency
• @dependabot ignore this major version will close this PR and stop Dependabot creating any more for this major version (unless you reopen the PR or upgrade to it yourself)
• @dependabot ignore this minor version will close this PR and stop Dependabot creating any more for this minor version (unless you reopen the PR or upgrade to it yourself)
• @dependabot ignore this dependency will close this PR and stop Dependabot creating any more for this dependency (unless you reopen the PR or upgrade to it yourself)