MemFS

A high-performance Linux kernel module that creates volatile RAM-based file systems for ultra-low latency data operations.

MemFS bypasses traditional disk I/O bottlenecks by hosting file systems entirely within system memory. It operates as a stackable file system (similar to Wrapfs) to provide a high-speed volatile storage layer for temporary data, build artifacts, or cache files. By leveraging direct RAM access, MemFS eliminates seek times and rotational latency, making it an ideal choice for developers running intensive test suites or managing high-frequency transient workloads that do not require persistence across reboots.

https://github.com/kimchi-project/memfs