An attempt at timing the difference checksumming makes when downloading hugo

time_compare.sh

#!/bin/sh
set -eu

setup() {
    GITHUB_WORKSPACE="$(mktemp -d)"
    DOWNLOADS="$(mktemp -d)"
    export GITHUB_WORKSPACE
    export DOWNLOADS
    eval "$(curl -fsSL 'https://api.github.com/repos/gohugoio/hugo/releases/latest' \
    | jq --compact-output --raw-output '.assets |
(
  map(select(.name | test("^hugo_extended_\\d+\\.\\d+\\.\\d+_Linux-64bit.tar.gz$")))[0] 
  | ["HUGO_FILENAME='"'"'" + .name + "'"'"'", "HUGO_URL='"'"'" + .browser_download_url + "'"'"'"]
)
+
(
  map(select(.name | test("^hugo_\\d+\\.\\d+\\.\\d+_checksums.txt$")))[0] 
  | ["CHECKSUM_FILENAME='"'"'" + .name + "'"'"'", "CHECKSUM_URL='"'"'" + .browser_download_url + "'"'"'"]
)
| .[]')"
    curl -fsSL "${CHECKSUM_URL}" --output "${DOWNLOADS}/${CHECKSUM_FILENAME}"
    curl -fsSL "${HUGO_URL}" --output "${DOWNLOADS}/${HUGO_FILENAME}"
    jq -n "
    [
      {
        draft: false,
        prerelease: false,
        assets: [
          {
            name: \"${CHECKSUM_FILENAME}\",
            browser_download_url: \"http://localhost:8080/${CHECKSUM_FILENAME}\"
          },
          {
            name: \"${HUGO_FILENAME}\",
            browser_download_url: \"http://localhost:8080/${HUGO_FILENAME}\"
          }
        ]
      }
    ]" > "${DOWNLOADS}/latest_release.json"
    
    PYTHON_PID="$(python -m http.server -d "${DOWNLOADS}" 8080 > /dev/null 2>&1 & echo $!)"
    export PYTHON_PID

    START="$(date +%s)"
    while ! curl -fsSL 'http://localhost:8080/latest_release.json' > /dev/null 2>&1 ; do
        if [ "$(date +%s)" -gt "$((START + 3))" ]; then
            echo "python didn't start"
            exit 1
        fi
    done
}

cleanup() {
    set +ex
    kill -1 "${PYTHON_PID}"
    rm -r "${GITHUB_WORKSPACE}" "${DOWNLOADS}"
}

trap cleanup EXIT HUP INT QUIT KILL
 
old() {
    RELEASE_BINARY_URL="$(curl --fail \
         --silent \
         --show-error \
         --location \
         'http://localhost:8080/latest_release.json' \
         | jq -r 'map(select(.draft == false and .prerelease == false))[0]["assets"] | map(select(.name | test("^hugo_extended_\\d+\\.\\d+\\.\\d+_Linux-64bit.tar.gz$"))) | .[0].browser_download_url')"
    mkdir -p "${GITHUB_WORKSPACE}/hugo/"
    curl --fail \
         --silent \
         --show-error \
         --location \
         "${RELEASE_BINARY_URL}" \
         | tar -xzf - -C "${GITHUB_WORKSPACE}/hugo/"
}
     
new() {
    HUGO_DIR="${GITHUB_WORKSPACE:-"$(pwd)"}/hugo"
    mkdir -p "${HUGO_DIR}"
    eval "$(curl --fail \
        --silent \
        --show-error \
        --location \
        --url 'http://localhost:8080/latest_release.json' \
        | jq --compact-output --raw-output 'map(select(.draft == false and .prerelease == false))[0]["assets"] |
            (
              map(select(.name | test("^hugo_extended_\\d+\\.\\d+\\.\\d+_Linux-64bit.tar.gz$")))[0] 
              | ["HUGO_FILENAME='"'"'" + .name + "'"'"'", "HUGO_URL='"'"'" + .browser_download_url + "'"'"'"]
            )
            +
            (
              map(select(.name | test("^hugo_\\d+\\.\\d+\\.\\d+_checksums.txt$")))[0] 
              | ["CHECKSUM_FILENAME='"'"'" + .name + "'"'"'", "CHECKSUM_URL='"'"'" + .browser_download_url + "'"'"'"]
            )
            | .[]')"
    curl --fail \
         --silent \
         --show-error \
         --location \
         --url "${CHECKSUM_URL}" \
         --output "${HUGO_DIR}/${CHECKSUM_FILENAME}" &
    CHECKSUM_PID=$!
    curl --fail \
         --silent \
         --show-error \
         --location \
         --url "${HUGO_URL}" \
         --output "${HUGO_DIR}/${HUGO_FILENAME}" &
    HUGO_PID=$!
    wait "${CHECKSUM_PID}" "${HUGO_PID}"
    (cd "${HUGO_DIR}" && sha256sum --check --ignore-missing --status "${CHECKSUM_FILENAME}")
    tar -xzf "${HUGO_DIR}/${HUGO_FILENAME}" --overwrite -C "${HUGO_DIR}"
    rm "${HUGO_DIR}/LICENSE" "${HUGO_DIR}/README.md" "${HUGO_DIR}/${HUGO_FILENAME}" "${HUGO_DIR}/${CHECKSUM_FILENAME}"
}

setup

for i in $(seq 10); do
    times
    old
    times
    "${GITHUB_WORKSPACE}/hugo/hugo" version 2>&1 >/dev/null
    rm -r "${GITHUB_WORKSPACE}/hugo/"
    times
    new
    times
    "${GITHUB_WORKSPACE}/hugo/hugo" version 2>&1 >/dev/null
    rm -r "${GITHUB_WORKSPACE}/hugo/"
done