IC697CMM711動(dòng)態(tài)分配存儲(chǔ)器技術(shù)
動(dòng)態(tài)存儲(chǔ)器分配是一項(xiàng)編程師應(yīng)盡可能避免的復(fù)雜操作。例如，如果動(dòng)態(tài)分配出現(xiàn)在將數(shù)據(jù)存儲(chǔ)到數(shù)組內(nèi)的一個(gè)循環(huán)內(nèi)，那么它尤其有害。避免在一個(gè)循環(huán)內(nèi)動(dòng)態(tài)分配存儲(chǔ)器的常用方法是在該循環(huán)開(kāi)始執(zhí)行前，為每個(gè)數(shù)組預(yù)分配所需的存儲(chǔ)空間。
移位寄存器與隧道技術(shù)IC697CMM711
LabView 的移位寄存器與隧道使數(shù)據(jù)進(jìn)/出循環(huán)。工程師還利用移位寄存器在一個(gè)循環(huán)的每次執(zhí)行之間傳遞數(shù)據(jù)。當(dāng)數(shù)據(jù)用一個(gè)輸入隧道傳進(jìn)一個(gè)循環(huán)時(shí)，LabView必須拷貝該數(shù)據(jù)并將該拷貝數(shù)據(jù)送出來(lái)進(jìn)行下線修改。為了確保原始數(shù)據(jù)對(duì)該循環(huán)的下次迭代執(zhí)行時(shí)保持不變，這樣做是必需的。工程師也可以通過(guò)用一個(gè)移位寄存器把數(shù)據(jù)傳進(jìn)該循環(huán)的方法來(lái)避免拷貝。這樣就消除了不必要的拷貝，從而加快了運(yùn)行速度。
IC697CMM711
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IC697CMM711
