Go 1 19
Overview
Go 1.19 introduces performance improvements, enhanced memory management, and tooling enhancements. Released in August 2022, this release continues Go’s evolution toward better performance and developer experience.
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flowchart TD
A[Go 1.19 Release<br/>August 2022] --> B[Performance Improvements]
A --> C[Memory Management]
A --> D[Tooling Enhancements]
A --> E[Standard Library Updates]
B --> B1[Faster GC<br/>Lower Latency]
B --> B2[Compiler Optimizations<br/>Smaller Binaries]
C --> C1[Soft Memory Limit<br/>GOMEMLIMIT]
C --> C2[Automatic Tuning<br/>GC Pacing]
D --> D1[doc Comments<br/>Enhanced Format]
E --> E1[Atomic Types<br/>atomic.Pointer]
style A fill:#0173B2,color:#fff
style B fill:#DE8F05,color:#fff
style C fill:#029E73,color:#fff
style D fill:#CC78BC,color:#fff
style E fill:#0173B2,color:#fff
Key Features
Soft Memory Limit (GOMEMLIMIT)
Control maximum heap memory usage:
# Set 2GB memory limit
GOMEMLIMIT=2GiB go run main.goFaster Garbage Collector
Improved GC with lower latency and better throughput.
Enhanced Doc Comments
Better documentation formatting with links and lists.
atomic.Pointer Type
Type-safe atomic pointers:
var ptr atomic.Pointer[Config]
config := &Config{Host: "localhost"}
ptr.Store(config)
current := ptr.Load()Breaking Changes
Consult the official Go 1.19 documentation for detailed breaking changes and migration guidance.
References
Last Updated: 2026-02-04 Go Version: 1.18+ (baseline), 1.25.x (latest stable)
Last updated