rav1e pgo stuff

gistfile1.sh

#!/usr/bin/bash

# Replace --target with your own, it seems it's recommended to have it there
# explicitly according to rust's docs

# normal build
cargo build --release --target=x86_64-unknown-linux-gnu

# compile with profile-generate
mkdir -p pgo-profile
RUSTFLAGS="-Cprofile-generate=$PWD/pgo-profile" \
    cargo build --release --target=x86_64-unknown-linux-gnu --target-dir pgo

# run encoder on test set, doesn't need to be parallel
parallel -u ./pgo/x86_64-unknown-linux-gnu/release/rav1e --output /dev/null --threads "$(nproc)" ::: ./objective-1-fast/*.y4m

# merge the data
llvm-profdata merge -o "$PWD/pgo-profile/merged.profdata" "$PWD/pgo-profile"

# compile with profile-use
RUSTFLAGS="-Cprofile-use=$PWD/pgo-profile/merged.profdata -Cllvm-args=-pgo-warn-missing-function" \
    cargo build --release --target=x86_64-unknown-linux-gnu --target-dir pgo

# final binary avilable at ./pgo/x86_64-unknown-linux-gnu/release/rav1e