Jul 6, 2026

We added a bridge-free libbitcoin direct benchmark and report for hash256_var_batch, targeting variable-length Bitcoin HASH256 workloads such as txid/wtxid preimages after libbitcoin performs CPU-side serialization. The direct surface stays C++ only: no C ABI, no shim, no bridge. The benchmark JSON records whether the production GPU hook is installed and accepted, so CPU fallback results cannot be mistaken for GPU throughput. Report: github.com/shrec/…/blob/…/…