Explore the new low latency concurrent garbage collection (GC) introduced in Go 1.5 in this GopherCon 2015 talk by Rick Hudson. Dive into the motivations behind addressing long GC pauses, a major obstacle to Go's adoption in managed runtimes. Examine performance metrics, technical challenges, and the rationale behind this approach's compatibility with the Go language. Learn about the mark phase algorithm, garbage benchmarks, and associated costs. Gain insights into how this improvement aims to eliminate long GC pauses, potentially accelerating Go's growth and enhancing its appeal to developers seeking a more efficient programming environment.