When you're competing in the US employment market you need to have all the right tools and resources, and your resume has a huge job to do for you.
CV's don't exist in the USA - they use "resumes'.
Resumes are short, sharp, clear and concise 'marketing documents' - that have to present and market you perfectly to potential employers - to get your foot in the door.
2 pages is the standard length of a resume. You have to deliver the most important and key aspects of your skills, experience and education, in 2 pages.
Your resume also has to make you stand out from the crowd of other resumes employers receive, and, clearly present employers with a great reason to consider you and select to interview you.
Using a resume that meets best practice standards for the US employment market - incresaes your chances to get considered and interviewed - and that increases your chances to get successfully hired and get an H1B visa.