A snippet that helps you find the time cost of `source` in rc scripts

rc_stat.sh

# Put these two functions at the top of your `.zshrc` or `.bashrc`

function _timestamp_ms() {
    if [[ "$(uname)" == "Darwin" ]]; then
        echo $(gdate +%s%3N)
    else
        echo $(date +%s%3N)
    fi
}

# source with timer
function source() {
    local ts=$(_timestamp_ms)
    builtin source $1
    local te=$(_timestamp_ms)
    echo "$(($te - $ts))ms: source $1"
}

# eval with timer (only use if necessary)
#function eval() {
#    local ts=$(_timestamp_ms)
#    builtin eval $1
#    local te=$(_timestamp_ms)
#    echo "$(($te - $ts))ms: eval $1"
#}