modification tracking
修改跟踪
以上为机器翻译结果，长、整句建议使用 人工翻译 。
With a little cleverness, it is possible to avoid the overhead of tracking every pointer modification and inspecting it to see if it crosses generational boundaries.
用一点小技巧，就可以避免跟踪每一个指针修改并检查它是否跨越代边界的开销。
youdao
The modification still needs refining, but it already incorporates head tracking and warping.
ENGADGET
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