関数型言語の勉強にSICPを読もう - (82) 5章 - レジスタ計算機での計算(324-327ページ)

「ストップアンドコピーごみ集めの実装」を読んだ。
欠点は

The costs of the stop-and-copy algorithm are twofold: First, the algorithm requires that all live objects be copied every time garbage collection is invoked. If an application program has a large memory footprint, the time required to copy all objects can be quite significant. A second cost associated with stop-and-copy is the fact that it requires twice as much memory as the program actually uses. When garbage collection is finished, at least half of the memory space is unused.

ですね。