Supporting concatenation would allow use-cases such as generating new
Discord to start requiring face scan or ID to access adult content
，这一点在体育直播中也有详细论述
⚽ Premier League: 10 things to look out for this weekend
Naively one might think that the DEALLOC function is a good time to coalesce, but it’s not. If two adjacent blocks are freed, and the block higher in memory is freed last, coalescing can’t be done because DOS cannot reach the previous (lower in memory) MCB, only the next one.