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Updating native lib to LMDB 1.0.1 line with new API support - #202

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Aug 8, 2026
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Updating native lib to LMDB 1.0.1 line with new API support#202
CoreyKaylor merged 1 commit into
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lmdbv1

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@CoreyKaylor

@CoreyKaylorCoreyKaylor commented Jul 5, 2026

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This updates the bundled native binaries to the LMDB 1.0 series and binds the new APIs. Opening this up for comments before shipping — it's published as 0.23.0-alpha for the reasons below.

⚠️ Breaking: the 1.0 on-disk format is incompatible with 0.9.x. Existing databases must be migrated once via mdb_dump (0.9 tools) → mdb_load (1.0 tools). DBI names are also stored NUL-terminated now.

What's new

  • Opt-in page encryption and checksums. LMDB ships no cipher; the library includes hardware-accelerated AES-256-GCM (AesGcmCipher) and SHA-256 (Sha256Checksum), with LightningCipher/LightningChecksum base classes for custom implementations.
  • Two-phase commit: tx.Prepare() + env.RollbackLastTransaction(txId).
  • Incremental backup: IncrementalCopyTo / IncrementalCopyToStream / LoadIncrementalFromStream.
  • EnvironmentConfiguration.PageSize, EnvironmentOpenFlags.PreviousSnapshot, per-transaction NoSync/NoMetaSync, and the new 1.0 error codes.

Why alpha

  • The LMDB_1.0.0 release tag doesn't compile for Windows and is missing ~20 post-release fixes to exactly the features bound here (ITS#10515, ITS#10518–10523). Binaries are built from a pinned mdb.master3 commit (7ed58053d0, self-reports 0.9.90) plus a small local mingw patch (lmdb/mingw-win32-fixes.patch). Will re-pin to the release tag and drop the patch when upstream cuts 1.0.1.
  • Upstream quirk found while testing: after mdb_env_rollback the environment can't be reopened unless a write commits first — documented on RollbackLastTransaction and covered by a test.

Feedback welcome, particularly on the encryption API shape before it stabilizes.

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Benchmark Results

✅ No significant performance regressions detected

⚠️ Minor performance degradation (20-40%)

1 benchmarks showed minor slowdown

All results (174 benchmarks)
BenchmarkBaselineCurrentChange
ComparerReadBenchmarks.Read(OpsPerTransaction: 100, ValueSize: 64, Comparer: Length)10585.04ns12894.20ns⚠️ +21.8%
CursorIterationBenchmarks.EnumerateBoxed(Entries: 1000, ValueSize: 256)9797.89ns11304.02ns✅ +15.4%
ComparerWriteBenchmarks.Write(OpsPerTransaction: 1000, ValueSize: 256, Comparer: ReverseGuid)27189.50ns31112.02ns✅ +14.4%
ComparerWriteBenchmarks.Write(OpsPerTransaction: 1000, ValueSize: 256, Comparer: ReverseBitwise)27086.41ns30967.33ns✅ +14.3%
ComparerWriteBenchmarks.Write(OpsPerTransaction: 1000, ValueSize: 256, Comparer: ReverseUtf8String)27041.69ns30603.31ns✅ +13.2%
ComparerWriteBenchmarks.Write(OpsPerTransaction: 1000, ValueSize: 256, Comparer: ReverseLength)28459.92ns31614.16ns✅ +11.1%
IntegerComparerBenchmarks.WriteIntegers(KeySize: 4, OpsPerTransaction: 10000, Comparer: ReverseSignedInt)1622648.92ns1796629.87ns✅ +10.7%
GuidComparerBenchmarks.WriteGuids(OpsPerTransaction: 1000, Comparer: Guid)508729.37ns557267.31ns✅ +9.5%
CursorIterationBenchmarks.EnumerateForeach(Entries: 1000, ValueSize: 8)8910.74ns9698.51ns✅ +8.8%
CursorIterationBenchmarks.EnumerateBoxed(Entries: 1000, ValueSize: 8)8934.68ns9643.71ns✅ +7.9%
ComparerWriteBenchmarks.Write(OpsPerTransaction: 1000, ValueSize: 256, Comparer: ReverseSignedInt)174691.04ns188010.50ns✅ +7.6%
IntegerComparerBenchmarks.WriteIntegers(KeySize: 4, OpsPerTransaction: 10000, Comparer: ReverseUnsignedInt)1699744.63ns1821963.95ns✅ +7.2%
ReadBenchmarks.Read(OpsPerTransaction: 100, ValueSize: 256, KeyOrder: Sequential)6897.78ns7362.05ns✅ +6.7%
IntegerComparerBenchmarks.WriteIntegers(KeySize: 4, OpsPerTransaction: 1000, Comparer: SignedInt)445724.50ns475017.02ns✅ +6.6%
ComparerReadBenchmarks.Read(OpsPerTransaction: 100, ValueSize: 256, Comparer: Default)6969.59ns7416.67ns✅ +6.4%
ComparerWriteBenchmarks.Write(OpsPerTransaction: 1000, ValueSize: 256, Comparer: LengthOnly)274901.94ns292187.15ns✅ +6.3%
ComparerReadBenchmarks.Read(OpsPerTransaction: 100, ValueSize: 64, Comparer: Default)6735.97ns7157.07ns✅ +6.3%
IntegerComparerBenchmarks.WriteIntegers(KeySize: 4, OpsPerTransaction: 1000, Comparer: UnsignedInt)453012.30ns480547.18ns✅ +6.1%
ReadBenchmarks.Read(OpsPerTransaction: 1, ValueSize: 8, KeyOrder: Sequential)196.35ns208.08ns✅ +6.0%
ComparerWriteBenchmarks.Write(OpsPerTransaction: 1000, ValueSize: 256, Comparer: ReverseUnsignedInt)168704.33ns178633.51ns✅ +5.9%
IntegerComparerBenchmarks.WriteIntegers(KeySize: 8, OpsPerTransaction: 10000, Comparer: ReverseSignedInt)1574193.64ns1662986.67ns✅ +5.6%
ComparerReadBenchmarks.Read(OpsPerTransaction: 100, ValueSize: 64, Comparer: Bitwise)10526.47ns11115.85ns✅ +5.6%
GuidComparerBenchmarks.WriteGuids(OpsPerTransaction: 10000, Comparer: ReverseGuid)2739640.90ns2888255.00ns✅ +5.4%
ComparerReadBenchmarks.Read(OpsPerTransaction: 100, ValueSize: 64, Comparer: UnsignedInt)10067.11ns10609.81ns✅ +5.4%
GuidComparerBenchmarks.WriteGuids(OpsPerTransaction: 10000, Comparer: Guid)2665917.24ns2806891.77ns✅ +5.3%
ComparerWriteBenchmarks.Write(OpsPerTransaction: 100, ValueSize: 256, Comparer: ReverseUtf8String)242819.38ns255361.94ns✅ +5.2%
ComparerReadBenchmarks.Read(OpsPerTransaction: 100, ValueSize: 256, Comparer: ReverseGuid)11038.94ns11597.26ns✅ +5.1%
ReadBenchmarks.Read(OpsPerTransaction: 100, ValueSize: 64, KeyOrder: Sequential)6780.85ns7117.39ns✅ +5.0%
IntegerComparerBenchmarks.WriteIntegers(KeySize: 8, OpsPerTransaction: 10000, Comparer: Default)2023578.47ns2121562.08ns✅ +4.8%
CursorIterationBenchmarks.TryGetAllocating(Entries: 1000, ValueSize: 256)176520.15ns184982.26ns✅ +4.8%
ReadBenchmarks.Read(OpsPerTransaction: 1000, ValueSize: 256, KeyOrder: Sequential)110750.22ns116023.53ns✅ +4.8%
ComparerReadBenchmarks.Read(OpsPerTransaction: 100, ValueSize: 256, Comparer: ReverseBitwise)10710.61ns11188.66ns✅ +4.5%
ReadBenchmarks.Read(OpsPerTransaction: 1, ValueSize: 64, KeyOrder: Sequential)191.74ns199.94ns✅ +4.3%
ComparerReadBenchmarks.Read(OpsPerTransaction: 1000, ValueSize: 64, Comparer: Default)109620.38ns114196.88ns✅ +4.2%
ComparerReadBenchmarks.Read(OpsPerTransaction: 1000, ValueSize: 64, Comparer: LengthOnly)35148.37ns36593.89ns✅ +4.1%
IntegerComparerBenchmarks.WriteIntegers(KeySize: 4, OpsPerTransaction: 10000, Comparer: UnsignedInt)678255.97ns706110.07ns✅ +4.1%
IntegerComparerBenchmarks.WriteIntegers(KeySize: 8, OpsPerTransaction: 10000, Comparer: UnsignedInt)510994.66ns531978.71ns✅ +4.1%
IntegerComparerBenchmarks.WriteIntegers(KeySize: 8, OpsPerTransaction: 10000, Comparer: ReverseUnsignedInt)1586802.34ns1651514.93ns✅ +4.1%
ComparerReadBenchmarks.Read(OpsPerTransaction: 100, ValueSize: 64, Comparer: ReverseSignedInt)10202.02ns10602.42ns✅ +3.9%
ComparerReadBenchmarks.Read(OpsPerTransaction: 1000, ValueSize: 256, Comparer: Default)109645.52ns113875.81ns✅ +3.9%
ReadBenchmarks.Read(OpsPerTransaction: 1000, ValueSize: 8, KeyOrder: Sequential)112096.12ns116087.54ns✅ +3.6%
ComparerReadBenchmarks.Read(OpsPerTransaction: 100, ValueSize: 256, Comparer: ReverseSignedInt)10576.59ns10932.68ns✅ +3.4%
ComparerReadBenchmarks.Read(OpsPerTransaction: 100, ValueSize: 64, Comparer: Utf8String)10426.83ns10774.93ns✅ +3.3%
ComparerReadBenchmarks.Read(OpsPerTransaction: 1000, ValueSize: 256, Comparer: LengthOnly)35406.21ns36564.89ns✅ +3.3%
ReadBenchmarks.Read(OpsPerTransaction: 1000, ValueSize: 64, KeyOrder: Sequential)109491.67ns112985.10ns✅ +3.2%
ComparerReadBenchmarks.Read(OpsPerTransaction: 100, ValueSize: 64, Comparer: ReverseGuid)10661.45ns10982.88ns✅ +3.0%
ComparerReadBenchmarks.Read(OpsPerTransaction: 100, ValueSize: 256, Comparer: Length)10935.22ns11228.49ns✅ +2.7%
ComparerReadBenchmarks.Read(OpsPerTransaction: 100, ValueSize: 256, Comparer: ReverseLength)11036.15ns11330.88ns✅ +2.7%
ComparerReadBenchmarks.Read(OpsPerTransaction: 100, ValueSize: 256, Comparer: ReverseUtf8String)10871.14ns11159.75ns✅ +2.7%
ComparerReadBenchmarks.Read(OpsPerTransaction: 100, ValueSize: 64, Comparer: ReverseUtf8String)10524.18ns10793.17ns✅ +2.6%
ComparerReadBenchmarks.Read(OpsPerTransaction: 100, ValueSize: 256, Comparer: UnsignedInt)10562.45ns10817.87ns✅ +2.4%
ReadBenchmarks.Read(OpsPerTransaction: 100, ValueSize: 8, KeyOrder: Sequential)5378.77ns5506.46ns✅ +2.4%
WriteBenchmarks.Write(OpsPerTransaction: 100, ValueSize: 8, KeyOrder: Sequential)183690.92ns187956.88ns✅ +2.3%
ComparerReadBenchmarks.Read(OpsPerTransaction: 100, ValueSize: 256, Comparer: LengthOnly)3794.22ns3879.93ns✅ +2.3%
ComparerWriteBenchmarks.Write(OpsPerTransaction: 100, ValueSize: 256, Comparer: LengthOnly)184548.38ns188471.93ns✅ +2.1%
ComparerReadBenchmarks.Read(OpsPerTransaction: 1000, ValueSize: 256, Comparer: ReverseGuid)173495.04ns177108.09ns✅ +2.1%
WriteBenchmarks.Write(OpsPerTransaction: 1, ValueSize: 256, KeyOrder: Sequential)174549.36ns178149.48ns✅ +2.1%
ComparerReadBenchmarks.Read(OpsPerTransaction: 100, ValueSize: 64, Comparer: LengthOnly)3767.12ns3843.17ns✅ +2.0%
GuidComparerBenchmarks.WriteGuids(OpsPerTransaction: 1000, Comparer: Default)466440.95ns475760.33ns✅ +2.0%
ComparerWriteBenchmarks.Write(OpsPerTransaction: 1000, ValueSize: 64, Comparer: ReverseUtf8String)493449.01ns502794.42ns✅ +1.9%
ComparerReadBenchmarks.Read(OpsPerTransaction: 100, ValueSize: 256, Comparer: HashCode)22419.03ns22822.61ns✅ +1.8%
ComparerReadBenchmarks.Read(OpsPerTransaction: 100, ValueSize: 256, Comparer: Bitwise)10898.20ns11082.58ns✅ +1.7%
ComparerReadBenchmarks.Read(OpsPerTransaction: 1000, ValueSize: 64, Comparer: Utf8String)169238.89ns171934.55ns✅ +1.6%
ComparerReadBenchmarks.Read(OpsPerTransaction: 100, ValueSize: 64, Comparer: ReverseLength)10879.77ns11052.16ns✅ +1.6%
ComparerReadBenchmarks.Read(OpsPerTransaction: 1000, ValueSize: 64, Comparer: Bitwise)169384.24ns172036.11ns✅ +1.6%
GuidComparerBenchmarks.WriteGuids(OpsPerTransaction: 1000, Comparer: Bitwise)518758.27ns526061.96ns✅ +1.4%
GuidComparerBenchmarks.WriteGuids(OpsPerTransaction: 10000, Comparer: Bitwise)2951723.12ns2993022.04ns✅ +1.4%
IntegerComparerBenchmarks.WriteIntegers(KeySize: 4, OpsPerTransaction: 10000, Comparer: SignedInt)721067.10ns731155.34ns✅ +1.4%
CursorIterationBenchmarks.TryGetSpanDestination(Entries: 1000, ValueSize: 256)129402.10ns130978.44ns✅ +1.2%
IntegerComparerBenchmarks.WriteIntegers(KeySize: 8, OpsPerTransaction: 10000, Comparer: SignedInt)523964.70ns530277.67ns✅ +1.2%
ComparerWriteBenchmarks.Write(OpsPerTransaction: 1000, ValueSize: 256, Comparer: Utf8String)748752.40ns757192.85ns✅ +1.1%
ComparerReadBenchmarks.Read(OpsPerTransaction: 1000, ValueSize: 256, Comparer: SignedInt)157034.27ns158763.84ns✅ +1.1%
ComparerWriteBenchmarks.Write(OpsPerTransaction: 1000, ValueSize: 64, Comparer: ReverseSignedInt)464151.18ns468659.80ns✅ +1.0%
ComparerReadBenchmarks.Read(OpsPerTransaction: 1000, ValueSize: 64, Comparer: ReverseUtf8String)168546.41ns170114.35ns✅ +0.9%
ComparerReadBenchmarks.Read(OpsPerTransaction: 1000, ValueSize: 64, Comparer: SignedInt)152561.29ns153964.68ns✅ +0.9%
ComparerReadBenchmarks.Read(OpsPerTransaction: 100, ValueSize: 256, Comparer: Utf8String)10968.82ns11069.18ns✅ +0.9%
ComparerReadBenchmarks.Read(OpsPerTransaction: 100, ValueSize: 64, Comparer: HashCode)21863.16ns22058.13ns✅ +0.9%
ComparerReadBenchmarks.Read(OpsPerTransaction: 100, ValueSize: 256, Comparer: ReverseUnsignedInt)10676.62ns10769.72ns✅ +0.9%
ComparerWriteBenchmarks.Write(OpsPerTransaction: 1000, ValueSize: 256, Comparer: Guid)748980.56ns755327.93ns✅ +0.8%
ComparerWriteBenchmarks.Write(OpsPerTransaction: 1000, ValueSize: 256, Comparer: Default)750936.00ns757146.45ns✅ +0.8%
ComparerReadBenchmarks.Read(OpsPerTransaction: 100, ValueSize: 64, Comparer: Guid)10704.31ns10780.10ns✅ +0.7%
ComparerReadBenchmarks.Read(OpsPerTransaction: 100, ValueSize: 64, Comparer: ReverseUnsignedInt)10249.75ns10301.26ns✅ +0.5%
WriteBenchmarks.Write(OpsPerTransaction: 1, ValueSize: 8, KeyOrder: Sequential)178141.34ns178915.57ns✅ +0.4%
WriteBenchmarks.Write(OpsPerTransaction: 1000, ValueSize: 256, KeyOrder: Sequential)750347.14ns753424.86ns✅ +0.4%
ComparerWriteBenchmarks.Write(OpsPerTransaction: 1000, ValueSize: 256, Comparer: Bitwise)755823.96ns758835.30ns✅ +0.4%
ComparerWriteBenchmarks.Write(OpsPerTransaction: 1000, ValueSize: 256, Comparer: Length)753525.73ns756485.96ns✅ +0.4%
ComparerWriteBenchmarks.Write(OpsPerTransaction: 100, ValueSize: 256, Comparer: HashCode)245548.36ns246421.51ns✅ +0.4%
ComparerReadBenchmarks.Read(OpsPerTransaction: 1000, ValueSize: 256, Comparer: ReverseLength)174537.20ns175100.68ns✅ +0.3%
WriteBenchmarks.Write(OpsPerTransaction: 100, ValueSize: 64, KeyOrder: Sequential)201398.17ns202011.96ns✅ +0.3%
ComparerReadBenchmarks.Read(OpsPerTransaction: 1000, ValueSize: 64, Comparer: ReverseUnsignedInt)156296.69ns156688.17ns✅ +0.3%
CursorIterationBenchmarks.TryGetSpanDestination(Entries: 1000, ValueSize: 8)123709.62ns123973.06ns✅ +0.2%
ComparerReadBenchmarks.Read(OpsPerTransaction: 1000, ValueSize: 256, Comparer: ReverseSignedInt)161998.10ns162249.31ns✅ +0.2%
ComparerReadBenchmarks.Read(OpsPerTransaction: 1000, ValueSize: 256, Comparer: ReverseUtf8String)172349.75ns172572.22ns✅ +0.1%
ComparerReadBenchmarks.Read(OpsPerTransaction: 1000, ValueSize: 64, Comparer: Length)172726.40ns172765.82ns✅ +0.0%
ComparerReadBenchmarks.Read(OpsPerTransaction: 100, ValueSize: 256, Comparer: Guid)11089.88ns11091.76ns✅ +0.0%
ComparerWriteBenchmarks.Write(OpsPerTransaction: 1000, ValueSize: 256, Comparer: SignedInt)743961.58ns743857.63ns✅ -0.0%
ComparerReadBenchmarks.Read(OpsPerTransaction: 1000, ValueSize: 256, Comparer: Length)171308.22ns171280.66ns✅ -0.0%
ComparerWriteBenchmarks.Write(OpsPerTransaction: 100, ValueSize: 256, Comparer: Utf8String)234999.47ns234807.17ns✅ -0.1%
CursorIterationBenchmarks.TryGetAllocating(Entries: 1000, ValueSize: 8)136074.80ns135867.11ns✅ -0.2%
IntegerComparerBenchmarks.WriteIntegers(KeySize: 8, OpsPerTransaction: 1000, Comparer: SignedInt)468440.37ns467714.77ns✅ -0.2%
ComparerReadBenchmarks.Read(OpsPerTransaction: 1000, ValueSize: 64, Comparer: ReverseLength)171742.06ns171414.00ns✅ -0.2%
ComparerReadBenchmarks.Read(OpsPerTransaction: 1000, ValueSize: 256, Comparer: ReverseBitwise)172056.05ns171715.96ns✅ -0.2%
ComparerWriteBenchmarks.Write(OpsPerTransaction: 1000, ValueSize: 256, Comparer: UnsignedInt)746972.43ns744427.82ns✅ -0.3%
IntegerComparerBenchmarks.WriteIntegers(KeySize: 4, OpsPerTransaction: 10000, Comparer: Default)2414122.96ns2405540.31ns✅ -0.4%
WriteBenchmarks.Write(OpsPerTransaction: 1000, ValueSize: 8, KeyOrder: Sequential)385937.84ns384382.38ns✅ -0.4%
ComparerWriteBenchmarks.Write(OpsPerTransaction: 100, ValueSize: 64, Comparer: HashCode)224124.11ns222981.43ns✅ -0.5%
ComparerWriteBenchmarks.Write(OpsPerTransaction: 100, ValueSize: 64, Comparer: ReverseGuid)212241.89ns211127.61ns✅ -0.5%
ComparerReadBenchmarks.Read(OpsPerTransaction: 1000, ValueSize: 256, Comparer: ReverseUnsignedInt)161230.58ns160167.06ns✅ -0.7%
ComparerReadBenchmarks.Read(OpsPerTransaction: 1000, ValueSize: 64, Comparer: Guid)171811.94ns170599.83ns✅ -0.7%
GuidComparerBenchmarks.WriteGuids(OpsPerTransaction: 10000, Comparer: Default)2524593.03ns2503635.24ns✅ -0.8%
ComparerReadBenchmarks.Read(OpsPerTransaction: 1000, ValueSize: 64, Comparer: ReverseBitwise)170464.39ns168966.21ns✅ -0.9%
IntegerComparerBenchmarks.WriteIntegers(KeySize: 4, OpsPerTransaction: 1000, Comparer: ReverseSignedInt)485689.59ns481295.42ns✅ -0.9%
ComparerReadBenchmarks.Read(OpsPerTransaction: 100, ValueSize: 256, Comparer: SignedInt)10654.84ns10546.44ns✅ -1.0%
ComparerWriteBenchmarks.Write(OpsPerTransaction: 100, ValueSize: 64, Comparer: UnsignedInt)211842.29ns209675.32ns✅ -1.0%
ComparerReadBenchmarks.Read(OpsPerTransaction: 1000, ValueSize: 256, Comparer: Bitwise)171144.20ns169349.58ns✅ -1.0%
ComparerWriteBenchmarks.Write(OpsPerTransaction: 1000, ValueSize: 64, Comparer: UnsignedInt)470112.79ns464901.35ns✅ -1.1%
ComparerReadBenchmarks.Read(OpsPerTransaction: 1000, ValueSize: 64, Comparer: UnsignedInt)155874.52ns154045.64ns✅ -1.2%
ComparerReadBenchmarks.Read(OpsPerTransaction: 100, ValueSize: 64, Comparer: SignedInt)10407.54ns10256.92ns✅ -1.4%
ComparerReadBenchmarks.Read(OpsPerTransaction: 1000, ValueSize: 256, Comparer: UnsignedInt)159715.61ns157377.55ns✅ -1.5%
ComparerReadBenchmarks.Read(OpsPerTransaction: 1000, ValueSize: 256, Comparer: HashCode)336761.04ns331277.46ns✅ -1.6%
WriteBenchmarks.Write(OpsPerTransaction: 100, ValueSize: 256, KeyOrder: Sequential)222733.14ns219015.26ns✅ -1.7%
ComparerWriteBenchmarks.Write(OpsPerTransaction: 100, ValueSize: 64, Comparer: LengthOnly)188982.02ns185534.31ns✅ -1.8%
GuidComparerBenchmarks.WriteGuids(OpsPerTransaction: 1000, Comparer: ReverseGuid)500487.61ns490958.91ns✅ -1.9%
IntegerComparerBenchmarks.WriteIntegers(KeySize: 8, OpsPerTransaction: 1000, Comparer: ReverseUnsignedInt)515295.77ns505267.95ns✅ -1.9%
ComparerReadBenchmarks.Read(OpsPerTransaction: 1000, ValueSize: 256, Comparer: Guid)172479.13ns169096.38ns✅ -2.0%
ComparerReadBenchmarks.Read(OpsPerTransaction: 1000, ValueSize: 64, Comparer: ReverseGuid)173460.30ns169914.43ns✅ -2.0%
ComparerWriteBenchmarks.Write(OpsPerTransaction: 100, ValueSize: 256, Comparer: Default)217577.70ns212934.38ns✅ -2.1%
IntegerComparerBenchmarks.WriteIntegers(KeySize: 4, OpsPerTransaction: 1000, Comparer: ReverseUnsignedInt)487542.39ns476383.65ns✅ -2.3%
ReadBenchmarks.Read(OpsPerTransaction: 1, ValueSize: 256, KeyOrder: Sequential)185.22ns180.73ns✅ -2.4%
ComparerWriteBenchmarks.Write(OpsPerTransaction: 100, ValueSize: 64, Comparer: Length)214014.20ns208620.07ns✅ -2.5%
ComparerWriteBenchmarks.Write(OpsPerTransaction: 1000, ValueSize: 64, Comparer: ReverseUnsignedInt)501971.40ns488719.10ns✅ -2.6%
ComparerWriteBenchmarks.Write(OpsPerTransaction: 100, ValueSize: 64, Comparer: ReverseUnsignedInt)220306.90ns214460.00ns✅ -2.7%
ComparerReadBenchmarks.Read(OpsPerTransaction: 1000, ValueSize: 256, Comparer: Utf8String)172675.88ns167581.09ns✅ -3.0%
ComparerReadBenchmarks.Read(OpsPerTransaction: 100, ValueSize: 64, Comparer: ReverseBitwise)11229.12ns10897.39ns✅ -3.0%
IntegerComparerBenchmarks.WriteIntegers(KeySize: 4, OpsPerTransaction: 1000, Comparer: Default)418950.61ns406374.00ns✅ -3.0%
ComparerReadBenchmarks.Read(OpsPerTransaction: 1000, ValueSize: 64, Comparer: ReverseSignedInt)159596.40ns154783.78ns✅ -3.0%
WriteBenchmarks.Write(OpsPerTransaction: 1000, ValueSize: 64, KeyOrder: Sequential)464114.05ns449954.82ns✅ -3.1%
ComparerWriteBenchmarks.Write(OpsPerTransaction: 100, ValueSize: 64, Comparer: ReverseSignedInt)217281.97ns210442.09ns✅ -3.1%
ComparerWriteBenchmarks.Write(OpsPerTransaction: 1000, ValueSize: 64, Comparer: ReverseGuid)492563.15ns477025.35ns✅ -3.2%
IntegerComparerBenchmarks.WriteIntegers(KeySize: 8, OpsPerTransaction: 1000, Comparer: UnsignedInt)471499.36ns455620.89ns✅ -3.4%
ComparerWriteBenchmarks.Write(OpsPerTransaction: 100, ValueSize: 256, Comparer: SignedInt)228831.32ns221083.71ns✅ -3.4%
ComparerWriteBenchmarks.Write(OpsPerTransaction: 100, ValueSize: 256, Comparer: ReverseUnsignedInt)243059.96ns234798.69ns✅ -3.4%
ComparerWriteBenchmarks.Write(OpsPerTransaction: 1000, ValueSize: 64, Comparer: ReverseLength)506542.41ns488723.57ns✅ -3.5%
IntegerComparerBenchmarks.WriteIntegers(KeySize: 8, OpsPerTransaction: 1000, Comparer: ReverseSignedInt)531575.93ns512810.35ns✅ -3.5%
ComparerReadBenchmarks.Read(OpsPerTransaction: 1000, ValueSize: 64, Comparer: HashCode)337457.85ns323954.23ns✅ -4.0%
ComparerWriteBenchmarks.Write(OpsPerTransaction: 1000, ValueSize: 64, Comparer: ReverseBitwise)512666.16ns491697.44ns✅ -4.1%
WriteBenchmarks.Write(OpsPerTransaction: 1, ValueSize: 64, KeyOrder: Sequential)180333.47ns172943.62ns✅ -4.1%
ComparerWriteBenchmarks.Write(OpsPerTransaction: 1000, ValueSize: 64, Comparer: LengthOnly)262257.45ns250508.60ns✅ -4.5%
ComparerWriteBenchmarks.Write(OpsPerTransaction: 100, ValueSize: 64, Comparer: Default)209928.81ns200485.81ns✅ -4.5%
ComparerWriteBenchmarks.Write(OpsPerTransaction: 1000, ValueSize: 64, Comparer: HashCode)661250.87ns631435.03ns✅ -4.5%
ComparerWriteBenchmarks.Write(OpsPerTransaction: 100, ValueSize: 256, Comparer: Bitwise)229913.87ns219349.52ns✅ -4.6%
ComparerWriteBenchmarks.Write(OpsPerTransaction: 100, ValueSize: 64, Comparer: Guid)213464.49ns202597.99ns✅ -5.1%
ComparerWriteBenchmarks.Write(OpsPerTransaction: 100, ValueSize: 64, Comparer: Utf8String)214330.89ns203418.82ns✅ -5.1%
CursorIterationBenchmarks.EnumerateForeach(Entries: 1000, ValueSize: 256)11910.98ns11295.50ns✅ -5.2%
ComparerWriteBenchmarks.Write(OpsPerTransaction: 1000, ValueSize: 64, Comparer: SignedInt)461856.29ns437819.22ns✅ -5.2%
ComparerWriteBenchmarks.Write(OpsPerTransaction: 1000, ValueSize: 64, Comparer: Bitwise)501142.62ns473187.19ns✅ -5.6%
ComparerWriteBenchmarks.Write(OpsPerTransaction: 100, ValueSize: 256, Comparer: Guid)231832.86ns218240.50ns✅ -5.9%
ComparerWriteBenchmarks.Write(OpsPerTransaction: 100, ValueSize: 64, Comparer: SignedInt)216875.14ns203891.77ns✅ -6.0%
ComparerWriteBenchmarks.Write(OpsPerTransaction: 100, ValueSize: 256, Comparer: Length)234152.11ns218524.89ns✅ -6.7%
ComparerWriteBenchmarks.Write(OpsPerTransaction: 100, ValueSize: 64, Comparer: ReverseBitwise)217167.17ns202134.18ns✅ -6.9%
ComparerWriteBenchmarks.Write(OpsPerTransaction: 100, ValueSize: 64, Comparer: ReverseLength)217911.16ns201884.49ns✅ -7.4%
ComparerWriteBenchmarks.Write(OpsPerTransaction: 1000, ValueSize: 64, Comparer: Default)447270.23ns413463.75ns✅ -7.6%
ComparerWriteBenchmarks.Write(OpsPerTransaction: 100, ValueSize: 256, Comparer: UnsignedInt)243162.28ns224493.66ns✅ -7.7%
IntegerComparerBenchmarks.WriteIntegers(KeySize: 8, OpsPerTransaction: 1000, Comparer: Default)462403.20ns422610.26ns✅ -8.6%
ComparerWriteBenchmarks.Write(OpsPerTransaction: 100, ValueSize: 64, Comparer: ReverseUtf8String)230304.23ns210202.50ns✅ -8.7%
ComparerWriteBenchmarks.Write(OpsPerTransaction: 100, ValueSize: 256, Comparer: ReverseBitwise)252500.81ns224762.29ns✅ -11.0%
ComparerWriteBenchmarks.Write(OpsPerTransaction: 1000, ValueSize: 64, Comparer: Length)516718.09ns458291.58ns✅ -11.3%
ComparerWriteBenchmarks.Write(OpsPerTransaction: 1000, ValueSize: 64, Comparer: Guid)521414.36ns457989.68ns✅ -12.2%
ComparerWriteBenchmarks.Write(OpsPerTransaction: 1000, ValueSize: 64, Comparer: Utf8String)555457.77ns487356.08ns✅ -12.3%
ComparerWriteBenchmarks.Write(OpsPerTransaction: 100, ValueSize: 256, Comparer: ReverseSignedInt)268321.35ns234930.39ns✅ -12.4%
ComparerWriteBenchmarks.Write(OpsPerTransaction: 100, ValueSize: 256, Comparer: ReverseGuid)266582.37ns230179.84ns✅ -13.7%
ComparerWriteBenchmarks.Write(OpsPerTransaction: 100, ValueSize: 256, Comparer: ReverseLength)270658.79ns231558.44ns✅ -14.4%
ComparerWriteBenchmarks.Write(OpsPerTransaction: 1000, ValueSize: 256, Comparer: HashCode)46777.72ns39986.63ns✅ -14.5%
ComparerWriteBenchmarks.Write(OpsPerTransaction: 100, ValueSize: 64, Comparer: Bitwise)244621.98ns203783.83ns✅ -16.7%

@CoreyKaylor
Upgrade bundled native LMDB to 1.0.1 with encryption and checksum APIs
b84b45c
Pin the multi-platform compile script to the LMDB_1.0.1 release tag and
rebuild all runtime assets. Expose LMDB 1.0 encryption/checksum support
(AES-GCM cipher helpers, page callbacks, env config, result codes) with
tests and README notes. Upstream ITS#10553 removed the need for the local
mingw SIZE_T MAP() patch.
@CoreyKaylorCoreyKaylor changed the title Updating native lib to LMDB 1.0 line with new API supportUpdating native lib to LMDB 1.0.1 line with new API supportAug 8, 2026
@CoreyKaylor

CoreyKaylor commented Aug 8, 2026

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Update (history rewritten)

This PR is now a single commit on top of main, force-pushed after rebasing native builds onto the official LMDB 1.0.1 release.

What changed since the earlier draft

  • Pinned lmdb/compile-lmdb-macos.sh to the LMDB_1.0.1 tag (was a pre-tag mdb.RE/1.0 SHA that still reported 1.0.0)
  • Rebuilt all multi-platform native runtimes against 1.0.1
  • Dropped mingw-map-len-type.patch — upstream ITS#10553 fixed the mingw SIZE_T / MAP() issue

Still in this PR

  • Managed API surface for LMDB 1.0 encryption / checksum (cipher helpers, page callbacks, env config, result codes)
  • Tests + README notes for the 1.0 line (including the on-disk format migration warning)

Local verification

  • dotnet test — 155 passed on net8.0 / net9.0 / net10.0

Stack note: dependent PRs (ios-unity#203 → wasm-support#204) base on this branch and will need a rebase onto the new tip.

@CoreyKaylor
CoreyKaylor merged commit f46102e into mainAug 8, 2026
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@CoreyKaylor
CoreyKaylor deleted the lmdbv1 branch August 8, 2026 01:17
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@CoreyKaylor