bench: add serial MSM benchmark #183
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This adds a benchmark for multi-scalar-multiplication on G1. It is the key operation for KZG commitments.
When comparing improvement over blst, using Nim is more convenient than Rust as the Rust wrapper always parallelize MSM.
The code is built in CI to make sure it doesn't go stale.
On a Ryzen 9 9950X, overclocked at 5.9GHz single core turbo.
nim c -r --cc:clang -d:danger --passC:-march=native --hints:off --warnings:off --outdir:build benchmarks/bls12381_msm_g1.nimConstantine
CC=clang nimble bench_ec_msm_bls12_381_g1