77859719f2
* Allow simultaneous uploads Upload files in batches for faster uploading * Fix concurrency issue Many requests to add files coming at the same time can cause duplicate folders to be created. In some cases, SQL exceptions can throw, and cause the application to hang. Add Semaphore to process files on a single thread. * Replace Semaphore with a Scope Provider As suggested in the PR comments, replaced Semaphore with ICoreScopeProvider * Revert "Replace Semaphore with a Scope Provider" This reverts commit 228e1010c61428c81f5162cb5e0dd2538357d816. * Add comment to make configurable Out of scope of the PR, but this should be configurable in appsettings * Apply PR 13345 Apply PR 13345 to resolve "freezing" issue caused by unhandled errors * Account for currently processing items If you drag files into the dropzone whilst other files are uploading then the "total" count is incorrect.
Umbraco CMS · 
Umbraco is the friendliest, most flexible and fastest growing ASP.NET CMS, and used by more than 500,000 websites worldwide. Our mission is to help you deliver delightful digital experiences by making Umbraco friendly, simpler and social.
Learn more at umbraco.com
See the official Umbraco website for an introduction, core mission and values of the product and team behind it.
Please also see our Code of Conduct.
Getting Started
Umbraco Cloud is the easiest and fastest way to use Umbraco yet, with full support for all your custom .NET code and integrations. You're up and running in less than a minute, and your life will be made easier with automated upgrades and a built-in deployment engine. We offer a free 14-day trial, no credit card needed.
If you want to DIY, then you can download Umbraco either as a ZIP file or via NuGet. It's the same version of Umbraco CMS that powers Umbraco Cloud, but you'll need to find a place to host it yourself, and handling deployments and upgrades will be all up to you.
Documentation
The documentation for Umbraco CMS can be found on Our Umbraco. The source for the Umbraco docs is open source as well and we're happy to look at your documentation contributions.
Join the Umbraco community
Our friendly community is available 24/7 at the community hub, we call "Our Umbraco". Our Umbraco features forums for questions and answers, documentation, downloadable plugins for Umbraco, and a rich collection of community resources.
Besides "Our", we all support each other in our Community Discord Server and on Twitter: Umbraco HQ, Release Updates, #umbraco
Contributing
Umbraco is contribution-focused and community-driven. If you want to contribute back to the Umbraco source code, please check out our guide to contributing.