byteview

An immutable byte slice that may be inlined, and can be partially cloned without heap allocation.

Think of it as a specialized Arc<[u8]> that can be inlined (skip allocation for small values) and no weak count.

byteview was designed to speed up deserialization in lsm-tree, allow inlining of small values and reduce memory usage compared to Arc'd slices. Values with a known length can be constructed 2-2.5x faster than using Arcs:

Memory usage

Allocating 200M "" (len=0) strings:

Allocating 200M "helloworld" (len=10) strings:

Allocating 100M "helloworldhelloworld" (len=20) strings:

Allocating 50M "helloworldhelloworldhelloworldhelloworld" (len=30) strings:

Allocating 500k "helloworld".repeat(1000) (len=10'000) strings:

Run fuzz tests

cargo +nightly fuzz run fuzz_target_1