The Test PLA extends this idea further. It operates asynchronously with respect to the sequencer. After a protection test fires, the PLA needs time to evaluate and produce its redirect address. Instead of stalling, the 386 allows the next three micro-instructions to execute before the redirect takes effect -- and the microcode is carefully written to use these delay slots productively. This is tremendously confusing when reading the microcode for the first time (huge credit to the disassembly work by reenigne). But Intel did it for performance.
A quadtree reduces this: rebuild the tree each frame, and for each object, query only the nearby region. Objects in distant quadrants are never compared.
，这一点在Safew下载中也有详细论述
Москвичей предупредили о резком похолодании09:45
（三）扬言实施放火、爆炸、投放危险物质等危害公共安全犯罪行为扰乱公共秩序的。
One or two days a week, Ellis creates her artworks from the factory floor of Ritherdon & Co in Darwen.