Built for it!
Merb is also thread-safe and was originally engineered to handle multiple file uploads concurrently.
A simple, clearly documented core
Rather than trying to cram every feature under the sun into a single code base, we keep things to the bare minimum, without sacrificing anything important.
The core code in Merb is kept simple and well organised meaning it’s easier to understand, maintain and extend.
Featureful, flexible and extensible
While we try to keep the core as minimal and clean as possible, this hasn’t meant a sacrifice of features. Merb has a very comprehensive set of features which we are continually improving. For example the new provides, which replaces the responds_to API.
For any features that aren’t covered in Merb’s core, there are plugins. Rather than reinvent the wheel with a custom plugin framework, these are implemented as RubyGems, giving us easy plugin installation, updates and versioning.