openpyxl Needs 3 GB to Write a Million Rows, and One Keyword Argument Makes It 40 MB

Byali

Oct 3, 2026 #python

openpyxl Needs 3 GB to Write a Million Rows, and One Keyword Argument Makes It 40 MB

write_only=True cuts peak memory 74x and finishes 33% faster. XlsxWriter’s constant_memory=True cuts it 56x at identical speed. Neither is…

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openpyxl Needs 3 GB to Write a Million Rows, and One Keyword Argument Makes It 40 MB write_only=True cuts peak memory 74x and finishes 33% faster. XlsxWriter’s constant_memory=True cuts it 56x at identical speed. Neither is…Continue reading on Medium » Read More Python on Medium

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openpyxl Needs 3 GB to Write a Million Rows, and One Keyword Argument Makes It 40 MB

Byali

By ali

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