The cost of automatic memory management is latency and increased memory usage. In a soft real-time system like a game, the garbage collector may cause lag spikes so you miss the head-shot on your opponent. You also require at least 50% more memory for efficient automatic memory management. Throughput, however, is not one of the costs. You can in fact achieve higher throughput with automatic memory management than with manual memory management.
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The cost of automatic memory management is latency and increased memory usage. In a soft real-time system like a game, the garbage collector may cause lag spikes so you miss the head-shot on your opponent. You also require at least 50% more memory for efficient automatic memory management. Throughput, however, is not one of the costs. You can in fact achieve higher throughput with automatic memory management than with manual memory management.