Less size

    [jann@Jann-PC async master]$ uglifyjs < lib/async.js | wc -c
    6387
    [jann@Jann-PC async master]$ uglifyjs < lib/async.js | gzip | wc -c
    1909
    [jann@Jann-PC async master]$ git checkout less-size 
    Switched to branch 'less-size'
    [jann@Jann-PC async less-size]$ uglifyjs < lib/async.js | wc -c
    6063
    [jann@Jann-PC async less-size]$ uglifyjs < lib/async.js | gzip | wc -c
    1871
    [jann@Jann-PC async less-size]$

Size reduction: 5% without gzip, 2% with gzip.