Prepared Remarks:

Operator

Good morning. My name is Robert, and I will be your conference operator today. At this time, I'd like to welcome everyone to Dollar General's second quarter 2022 earnings conference call. Today is Thursday, August 25, 2022.

[Operator instructions] This call is being recorded. [Operator instructions] Now I'd like to turn the conference over to your host, Mr. Donny Lau, vice president of investor relations and corporate strategy. Mr.

Lau, you may begin the conference.

Donny Lau -- Vice President, Investor Relations

Thank you, and good morning, everyone. On the call with me today are Todd Vasos, our CEO; Jeff Owen, our COO; and John Garratt, our CFO. Our earnings release issued today can be found on our website at investor.dollargeneral.com under News & Events.Let me caution you that today's comments include forward-looking statements as defined in the Private Securities Litigation Reform Act of 1995. Such a statements about our financial guidance, strategy, initiatives, plans, goals, priorities, opportunities, investments, expectations or beliefs about future matters and other statements that are not limited to historical fact.

These statements are subject to risks and uncertainties that could cause actual results to differ materially from our expectations and projections. These factors include, but are not limited to, those identified in our earnings release issued this morning under Risk Factors in our 2021 Form 10-K filed on March 18, 2022, and any later filed periodic report and in the comments that are made on this call. You should not unduly rely on forward-looking statements, which speak only as of today's date. Dollar General disclaims any obligation to update or revise any information discussed in this call, unless required by law.

At the end of our prepared remarks, we will open the call up for your questions. [Operator instructions] Now it is my pleasure to turn the call over to Todd.

Todd Vasos -- Chief Executive Officer

Thank you, Donny, and welcome to everyone joining our call. We are pleased with our second quarter results, and I want to thank our associates for delivering another quarter of strong performance and for their dedication to serving our customers, communities, and each other. The quarter was highlighted by comp sales growth of 4.6%, a slight increase in customer traffic, accelerated growth in market share of highly consumable product sales, including in both dollars and units, and double-digit growth in diluted EPS. Our Q2 performance was led by stronger-than-expected sales in our consumable category.