Docker container performance optimization can be approached from multiple aspects: 1) choose appropriate base images (alpine, distroless, etc.) to reduce image size; 2) use multi-stage builds to keep only necessary files; 3) combine RUN instructions to reduce image layers; 4) leverage build cache by placing instructions that change less frequently earlier; 5) clean up unnecessary files and caches (apt-get clean, rm -rf /var/lib/apt/lists/*); 6) use .dockerignore to exclude unnecessary files; 7) optimize application code and dependencies; 8) set reasonable resource limits to avoid resource waste; 9) use health checks to ensure applications run properly; 10) regularly update base images and dependencies to get performance improvements and security fixes.