Regexp performance comparison

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Regexp 1
const r = /^\w(([\w-]*\w)?)$/
const str1 = 'a-b-c-d-e-f-g-h-i-j-k-l-m-n';
str1.match(r);
ready
Regexp 2
const r = /^\w+(-\w+)*$/
const str1 = 'a-b-c-d-e-f-g-h-i-j-k-l-m-n';
str1.match(r);
ready

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