Skip to content
    Moz logo Menu open Menu close
    • Products
      • Moz Pro
      • Moz Pro Home
      • Moz Local
      • Moz Local Home
      • STAT
      • Moz API
      • Moz API Home
      • Compare SEO Products
      • Moz Data
    • Free SEO Tools
      • Domain Analysis
      • Keyword Explorer
      • Link Explorer
      • Competitive Research
      • MozBar
      • More Free SEO Tools
    • Learn SEO
      • Beginner's Guide to SEO
      • SEO Learning Center
      • Moz Academy
      • MozCon
      • Webinars, Whitepapers, & Guides
    • Blog
    • Why Moz
      • Digital Marketers
      • Agency Solutions
      • Enterprise Solutions
      • Small Business Solutions
      • The Moz Story
      • New Releases
    • Log in
    • Log out
    • Products
      • Moz Pro

        Your all-in-one suite of SEO essentials.

      • Moz Local

        Raise your local SEO visibility with complete local SEO management.

      • STAT

        SERP tracking and analytics for enterprise SEO experts.

      • Moz API

        Power your SEO with our index of over 44 trillion links.

      • Compare SEO Products

        See which Moz SEO solution best meets your business needs.

      • Moz Data

        Power your SEO strategy & AI models with custom data solutions.

      Enhance Keyword Discovery with Bulk Analysis
      Moz Pro

      Enhance Keyword Discovery with Bulk Analysis

      Learn more
    • Free SEO Tools
      • Domain Analysis

        Get top competitive SEO metrics like DA, top pages and more.

      • Keyword Explorer

        Find traffic-driving keywords with our 1.25 billion+ keyword index.

      • Link Explorer

        Explore over 40 trillion links for powerful backlink data.

      • Competitive Research

        Uncover valuable insights on your organic search competitors.

      • MozBar

        See top SEO metrics for free as you browse the web.

      • More Free SEO Tools

        Explore all the free SEO tools Moz has to offer.

      NEW Keyword Suggestions by Topic
      Moz Pro

      NEW Keyword Suggestions by Topic

      Learn more
    • Learn SEO
      • Beginner's Guide to SEO

        The #1 most popular introduction to SEO, trusted by millions.

      • SEO Learning Center

        Broaden your knowledge with SEO resources for all skill levels.

      • On-Demand Webinars

        Learn modern SEO best practices from industry experts.

      • How-To Guides

        Step-by-step guides to search success from the authority on SEO.

      • Moz Academy

        Upskill and get certified with on-demand courses & certifications.

      • MozCon

        Save on Early Bird tickets and join us in London or New York City

      Access 20 years of data with flexible pricing
      Moz API

      Access 20 years of data with flexible pricing

      Find your plan
    • Blog
    • Why Moz
      • Digital Marketers

        Simplify SEO tasks to save time and grow your traffic.

      • Small Business Solutions

        Uncover insights to make smarter marketing decisions in less time.

      • Agency Solutions

        Earn & keep valuable clients with unparalleled data & insights.

      • Enterprise Solutions

        Gain a competitive edge in the ever-changing world of search.

      • The Moz Story

        Moz was the first & remains the most trusted SEO company.

      • New Releases

        Get the scoop on the latest and greatest from Moz.

      Surface actionable competitive intel
      New Feature

      Surface actionable competitive intel

      Learn More
    • Log in
      • Moz Pro
      • Moz Local
      • Moz Local Dashboard
      • Moz API
      • Moz API Dashboard
      • Moz Academy
    • Avatar
      • Moz Home
      • Notifications
      • Account & Billing
      • Manage Users
      • Community Profile
      • My Q&A
      • My Videos
      • Log Out

    The Moz Q&A Forum

    • Forum
    • Questions
    • My Q&A
    • Users
    • Ask the Community

    Welcome to the Q&A Forum

    Browse the forum for helpful insights and fresh discussions about all things SEO.

    1. Home
    2. SEO Tactics
    3. Technical SEO
    4. Speed benefits from loading images from a subdomain

    Moz Q&A is closed.

    After more than 13 years, and tens of thousands of questions, Moz Q&A closed on 12th December 2024. Whilst we’re not completely removing the content - many posts will still be possible to view - we have locked both new posts and new replies. More details here.

    Speed benefits from loading images from a subdomain

    Technical SEO
    2
    3
    1730
    Loading More Posts
    • Oldest to Newest
    • Newest to Oldest
    • Most Votes
    Reply
    • Reply as question
    Log in to reply
    This topic has been deleted. Only users with question management privileges can see it.
    • Gordian
      Gordian last edited by

      I have read that loading images from a subdomain of your site instead of the main domain will give you speed benefits on load time. Has anyone actually seen that to be the case? Thanks!

      1 Reply Last reply Reply Quote 0
      • Gordian
        Gordian @TakeshiYoung last edited by

        Thanks for the helpful advice!

        1 Reply Last reply Reply Quote 0
        • TakeshiYoung
          TakeshiYoung last edited by

          If you are talking about using a cookie-free subdomain, that can definitely have an impact on site speed:

          http://developer.yahoo.com/performance/rules.html#cookie_free

          Just using a subdomain won't have any benefit, and may even slow things down. Using a CDN for images and other components is usually the quickest and easiest solution for most sites.

          Gordian 1 Reply Last reply Reply Quote 1
          • 1 / 1
          • First post
            Last post

          Browse Questions

          Explore more categories

          • Moz Tools

            Chat with the community about the Moz tools.

          • SEO Tactics

            Discuss the SEO process with fellow marketers

          • Community

            Discuss industry events, jobs, and news!

          • Digital Marketing

            Chat about tactics outside of SEO

          • Research & Trends

            Dive into research and trends in the search industry.

          • Support

            Connect on product support and feature requests.

          • See all categories

          Related Questions

          • Mike555

            Google image search filter tabs and how to rank on them

            I have noticed Google image search has included suggestion tabs (e.g,. design, nature... when searching background) on the top of the image search.
            Are there specific meta tags I can add into my images so that my images will show up on each tab?
            Do those filters just show content based on image keywords or something else? IRme7gQ

            Technical SEO | | Mike555
            0
          • Katarina-Borovska

            Any SEO benefits of adding a Glossary to our website?

            Hi all, I manage a website for a software company. Many terms can be quite tricky so it would be nice to add a Glossary page. Other than that, I have 2 questions: 1. What would be the SEO benefits? 2. How would you suggest to implement this glossary so we can get as much SEO benefit as possible (for example how would we link, where would we place the glossary in the terms of the sitemap, etc.). Any advice appreciated! Katarina

            Technical SEO | | Katarina-Borovska
            2
          • sjbridle

            Do I need a separate robots.txt file for my shop subdomain?

            Hello Mozzers! Apologies if this question has been asked before, but I couldn't find an answer so here goes... Currently I have one robots.txt file hosted at https://www.mysitename.org.uk/robots.txt We host our shop on a separate subdomain https://shop.mysitename.org.uk Do I need a separate robots.txt file for my subdomain? (Some Google searches are telling me yes and some no and I've become awfully confused!

            Technical SEO | | sjbridle
            0
          • rodelmo4

            Does using a reverse proxy to make a subdomain appear as a subdirectory affect SEO?

            Using a reverse proxy only makes it appear that a subdomain is really a subfolder. However, links in the end remain the same. Does this have any negative (or positive) impact on SEO? Does it make it difficult from the blog's (subdomain's) sitemap or robots.txt file to be properly read by search engines?

            Technical SEO | | rodelmo4
            1
          • Rezza

            Migrating to new subdomain with new site and new content.

            Our marketing department has decided that a new site with new content is needed to launch new products and support our existing ones. We cannot use the same subdomain(www = old subdomain  and ww1 = new subdomain)as there is a technically clash between the windows server currently used, and the lamp stack required to run the new wordpress based CMS and site. We also have an aging piece of SAAS software on the www domain which is makes moving it to it's own subdomain far too risky. 301's have been floated as a way of managing the transition. I'm not too keen on that idea due to the double effect of new subdomain and content, and the SEO impact it might have. I've suggested uploading the new site to the new subdomain while leaving the old site in place. Then gradually migrating sections over before turning parts of the old site off and using a 301 at that point to finalise the move. The old site would inform user's there is a new version and it would then convert them to the new site(along with a cookie to auto redirect them in future.) while still leaving the old content in place for existing search traffic, bookmarks and visitors via static URLs. Before turning off sections on the old site we would create rel canonicals to redirect to the new pages based on a a mapped set of URLs(this in itself concerns me as the rel canonical is essentially linking to different content). Would be grateful for any advice on whether this strategy is flawed or whether another strategy might be more suitable?

            Technical SEO | | Rezza
            0
          • qgairsoft

            Are subdomains a good seo strategy for a multistore e-commerce?

            Hi there I'm wondering what is the best strategy to work with multi-stores on magento: to use or not to use subdomains? Suppose we have the www.website.com and we configure it to use multistore. The url base will not have the store id on it so it will not be like www.website.com/store1 and www.website.com/store2. It will simply rely on the user session so if we have two categories for each store it will acces using: www.website.com/category1 (for store 1) www.website.com/category2 (for store 2) The homepage will allways be set on www.website.com so we should have a single page for several "home pages" (depending on the user session / store he is accessing). I guess this is not a good option if we want to rank for different keywords (for each store). So I was wondering if it is a good solution to set: store1.website.com store2.website.com This way we have 2 "home pages" each one able to rank. Does it make sense? Is it good or bad for seo? Another option I was considering was: www.website.com (for store 1) store2.website.com (for store 2) store3.website.com (for store 3) www.website.com/blog (for blog) Can this work? Good or bad for seo? best regards

            Technical SEO | | qgairsoft
            0
          • Prospector-Plastics

            Subdomain vs Main Domain Penalties

            We have a client who's main root.com domain is currently penalized by Google, but the subdomain.root.com is appearing very well. We're stumped - any ideas why?

            Technical SEO | | Prospector-Plastics
            0
          • MarloSchneider

            How to move my blog from subdomain to subfolder?

            Not an unusual situation, I have a blog on blog.domain.com it has quite a few blog postings.  The platform is old and will be scrapped, but the blog content itself is going to be moved to domain.com/blog. The current process is we are manually listing all linked to/content pages and we are going to 301 redirect them to their counterparts on the new blog.  This is going to be a tedious process. A) Is there any way to automate the moving of the blog? B) What is the best way to do the massive 301 redirect, php headers, .htaccess?  Should we move the individual pages with redirects, or redirect the domain in the .htaccess (this will be very difficult to match all the titles and file structure)?

            Technical SEO | | MarloSchneider
            0

          Get started with Moz Pro!

          Unlock the power of advanced SEO tools and data-driven insights.

          Start my free trial
          Products
          • Moz Pro
          • Moz Local
          • Moz API
          • Moz Data
          • STAT
          • Product Updates
          Moz Solutions
          • SMB Solutions
          • Agency Solutions
          • Enterprise Solutions
          • Digital Marketers
          Free SEO Tools
          • Domain Authority Checker
          • Link Explorer
          • Keyword Explorer
          • Competitive Research
          • Brand Authority Checker
          • Local Citation Checker
          • MozBar Extension
          • MozCast
          Resources
          • Blog
          • SEO Learning Center
          • Help Hub
          • Beginner's Guide to SEO
          • How-to Guides
          • Moz Academy
          • API Docs
          About Moz
          • About
          • Team
          • Careers
          • Contact
          Why Moz
          • Case Studies
          • Testimonials
          Get Involved
          • Become an Affiliate
          • MozCon
          • Webinars
          • Practical Marketer Series
          • MozPod
          Connect with us

          Contact the Help team

          Join our newsletter
          Moz logo
          © 2021 - 2025 SEOMoz, Inc., a Ziff Davis company. All rights reserved. Moz is a registered trademark of SEOMoz, Inc.
          • Accessibility
          • Terms of Use
          • Privacy