perf: borrow LMDB strings without copying and reuse execution buffers

Cargo.toml

@@ -52,6 +52,14 @@ path    = "benchmarks/query_benchmark.rs"
 harness = false
 required-features = ["pprof"]
 
+[[example]]
+name              = "alloc_trace"
+required-features = ["lmdb", "orm", "parser"]
+
+[[example]]
+name              = "borrowed_parse"
+required-features = ["lmdb", "orm", "parser"]
+
 [dependencies]
 bumpalo               = { version = "3", default-features = false, features = ["collections"] }
 hashbrown             = { version = "0.15", default-features = false }
@@ -76,6 +84,8 @@ indicatif             = { version = "0.17" }
 tempfile              = { version = "3.10" }
 # Benchmark
 sqlite                = { version = "0.34" }
+serde                 = { version = "1", features = ["derive"] }
+serde_json            = { version = "1" }
 
 [target.'cfg(not(target_arch = "wasm32"))'.dependencies]
 # Optional dependencies for features

README.md

@@ -135,9 +135,9 @@ print(list(db.run("select * from demo")))
 
 | Backend | TpmC | New-Order | Payment | Order-Status | Delivery | Stock-Level |
 | --- | ---: | ---: | ---: | ---: | ---: | ---: |
-| KiteSQL LMDB | 209840 | 254 | 50 | 28 | 345 | 202 |
-| KiteSQL RocksDB | 48049 | 354 | 85 | 146 | 14511 | 562 |
-| SQLite (WAL, `synchronous=OFF`) | 192435 | 270 | 40 | 33 | 344 | 265 |
+| KiteSQL LMDB | 225720 | 240 | 44 | 25 | 326 | 179 |
+| KiteSQL RocksDB | 48746 | 343 | 78 | 140 | 14351 | 587 |
+| SQLite (WAL, `synchronous=OFF`) | 192110 | 270 | 40 | 33 | 342 | 231 |
 
 👉 [Details and how to reproduce](tpcc/README.md)