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Microsoft last week repeated its assertion that future Windows 10 feature upgrades will shrink in size later this year, and supported the claim with a smattering of data.
Those running Windows 10's preview, labeled "Insider," will see the largest reductions in download size, the data showed.

Windows 10's new update delivery system reduces the size of downloads -- in this case by 65% for an Insider refresh (in green) -- compared to a full-install "canonical" update (in blue), by sending only what has changed since the last update.
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