![]() For performance-critical code, it may be beneficial to allocate a memory arena and manage the memory manually to reduce the overhead of the garbage collector. ![]() Memory arenas is an experimental feature available in Go 1.20 behind the GOEXPERIMENT=arenas environment variable: You can use memory arenas in functions that allocate a large number of objects, process them for a while, and then free all of the objects at the end. Memory arenas allow to allocate objects from a contiguous region of memory and free them all at once with minimal memory management or garbage collection overhead. In addition, the memory usage is often larger than necessary, because Go runtime delays garbage collection as long as possible to free more memory in a single run. However, large Go programs have to spend a significant amount of CPU time doing garbage collection. Such automatic memory management simplifies the writing of Go applications and ensures memory safety. Go runtime achieves that by periodically running a garbage-collection algorithm that frees unreachable objects. Go is a garbage-collected language and so it can automatically free allocated objects for you. You can use memory arenas to improve performance by reducing the number of allocations and deallocations that need to occur during runtime. Go 1.20 release added a new experimental arena package that provides memory arenas. ![]()
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