TypeScript entrypoint startup time benchmark

benchmark.sh

#!/usr/bin/zsh

# Make sure that our branch-switch checks below don't skip the build.
git switch main >& /dev/null
npm ci >& /dev/null
gulp clean >& /dev/null
gulp local >& /dev/null

function bench() {
    name=$1
    command=$2

    hyperfine \
        --shell zsh \
        --warmup 100 \
        --runs 1000 \
        --command-name "$name main" \
        --prepare 'git switch main |& grep -q "Already" || (npm ci && gulp clean && gulp local)' \
        $command \
        --command-name "$name module-ified" \
        --prepare 'git switch typeformer-2 |& grep -q "Already" || (npm ci && gulp clean && gulp local)' \
        $command
}

bench "tsc" "node ./built/local/tsc.js --version"
bench "tsserver" "echo '{\"seq\": 1, \"command\": \"exit\"}' | node ./built/local/tsserver.js --disableAutomaticTypingAcquisition"
bench "typescript" "node ./built/local/typescript.js"
bench "tsserverlibrary" "node ./built/local/tsserverlibrary.js"