SharePoint Site Performance Issues - Slow Loading and Lag When Accessing Large Documents and Images.

Question

SharePoint Site Performance Issues - Slow Loading and Lag When Accessing Large Documents and Images.

Yosef Reed 0

Hello,

We are experiencing performance issues with a SharePoint Site that has become noticeably slow to load and navigate. Large Word documents containing numerous images and graphs appear to load slowly. General site responsiveness is degraded.

Here are some of the steps I have already taken:

Verified that Microsoft Word is not exhibiting excessive resources usage (CPU and memory utilization appears normal).
Confirmed that Track Changes is disabled in the affected Word document.
The affected document is 104 pages and contains multiple Images and graphs.
The issue appears to be related to document or SharePoint performance rather than local workstation resource constraints.

Information Requested:

Are there any known SharePoint performance issues related to large office documents or pages containing numerous high-resolution images.
Are there any Microsoft diagnostic tools, logs, or health checks we should review to identify the root cause?
Please advise if there are any tenant-specific settings or service issues that may be contributing to this behavior

Alexis-NG 18,070 Reputation points Microsoft External Staff Moderator

2026-07-01T17:43:44.1466667+00:00

Hi Yosef,

I hope everything is going well on your end.

I am following up on the support thread that has been discussed and wanted to check whether the information shared in my previous response helped address the issue you were experiencing.

If you are still encountering any issues or have additional questions, please feel free to reach out at any time. I would be happy to assist further as needed.

Additionally, ensuring that everything is functioning as expected and that your experience remains smooth is a top priority.

Thank you again for your collaboration throughout the troubleshooting process. I look forward to hearing from you soon.

2 answers

Your answer

Alexis-NG 18,070 Reputation points Microsoft External Staff Moderator

2026-07-01T17:43:44.1466667+00:00

Hi Yosef,

I hope everything is going well on your end.

I am following up on the support thread that has been discussed and wanted to check whether the information shared in my previous response helped address the issue you were experiencing.

If you are still encountering any issues or have additional questions, please feel free to reach out at any time. I would be happy to assist further as needed.

Additionally, ensuring that everything is functioning as expected and that your experience remains smooth is a top priority.

Thank you again for your collaboration throughout the troubleshooting process. I look forward to hearing from you soon.

Answer 1

Yosef Reed 0

Hello,

This information is very good to know but it does not help me. I do have a question what if staff compressed their images before entering them into SharePoint, would that help with lag and other issues?

-Yosef

Alexis-NG 18,070 Reputation points Microsoft External Staff Moderator

2026-07-02T17:59:23.32+00:00
Hi Yosef,

Compressing images before they are inserted into the Word document is a good practice and can reduce file size, improve document open times, and lessen lag when working with large image-heavy documents stored in SharePoint.

For reference: Optimize images in SharePoint in Microsoft 365 modern site pages - Microsoft 365 Enterprise | Micro…

However, it may not become the main factor to fix site-wide slowness

If only this large Word document is slow, image compression is a strong candidate for improvement.

If the entire SharePoint site is sluggish (pages, libraries, navigation, search, etc.), then there may be additional factors involved such as:

Large pages with many web parts

Large image files hosted on pages

Library design and item count

Network latency

Service-side performance issues

In that case, you should run the Page Diagnostics for SharePoint browser extension and collecting a network trace to determine whether the bottleneck is the page, the library, or the document itself. For example, if the Large images detected result appears in the Attention required section of the results, you can click the result to see additional details.

Answer 2

Hi Yosef,

A 104-page Word document containing numerous images and graphs can experience slower loading and rendering times, particularly when opened through browser-based experiences. Additionally, SharePoint page performance can be affected by large images, structural navigation, and a high number of API calls associated with page rendering. However, this may not be the only culprit.

For diagnostics, please navigate to Microsoft 365 Admin Center > Help & Support.

User's image

Once there, turn off the Support Assistant toggle located at the top of the page. Then enter a description of your issue in the search box.

If the issue is related to SharePoint Online, the relevant built-in diagnostic tools should appear among the suggested results. These diagnostics can help identify potential configuration, performance, or service-related issues affecting your site.

For example, you can follow the prompts shown in the image below:

User's image

For more information and in-dept diagnostic steps, please consult: Use the Page Diagnostics tool for SharePoint in Microsoft 365 - Microsoft 365 Enterprise | Microsof…

At the moment, there are no reported service-level incidents indicating a widespread SharePoint loading issue. To monitor any active advisories or incidents that may affect SharePoint Online, please navigate to Microsoft 365 Admin Center > Health > Service Health and review the current service status and updates.

Once you collect the logs to identify this issue, you can use your admin credentials to submit a support request through the Microsoft 365 Admin Center and provide them with the result of your diagnostic process.

This route ensures that a Microsoft support engineer can initiate a remote session to investigate backend configurations, run advanced diagnostic tools, and, if necessary, escalate the case to specialized teams with access to internal systems and logs. These backend resources are essential for resolving issues that go beyond what’s visible in the user interface.

As community moderators, we’re here to guide you, but due to privacy and security limitations, we don’t have access to the backend tools required for a full resolution. For this reason, contacting Microsoft Support via the Admin Center is the most secure and efficient way forward.

I hope this helps you resolve the issue quickly. I’m glad to assist and truly hope the information provided has been useful. Please feel free to reach out anytime if you need further assistance.

If you find my post helpful, kindly consider marking it as the accepted answer. Doing so can assist others in the community who may have similar questions in finding solutions more quickly.

Thank you for your kindness and contributions to the forum.

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