"peephole optimization" meaning in English

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  "etymology_text": "Coined by computer scientist William Marshall McKeeman in 1965, from peephole + optimization.",
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          "text": "The loop was more than twice as fast after I had applied peephole optimization.",
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        "An optimization that works by eliminating redundant instructions from a small area of source code."
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        "(software compilation) An optimization that works by eliminating redundant instructions from a small area of source code."
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