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'''Image swap''' refers to the rare event when a post's attached image is erroneously replaced by the attached image of an unrelated post. Sometimes only the thumbnail is swapped, other times a '''"full swap"''' swaps the true, expanded images entirely. Sometimes there is no swap, one simply overwrites the other. ''Image swaps'' seem to happen when images are processed at the same time in the eyes of 4chan's servers. Β | '''Image swap''' refers to the rare event when a post's attached image is erroneously replaced by the attached image of an unrelated post. Sometimes only the thumbnail is swapped, other times a '''"full swap"''' swaps the true, expanded images entirely. Sometimes there is no swap, one simply overwrites the other. ''Image swaps'' seem to happen when images are processed at the same time in the eyes of 4chan's servers. Β | ||
4chan servers currently index images by a 16-digit [https://en.wikipedia.org/wiki/Unix_time UNIX timestamp]<ref>Visible in the URL of any image</ref> which has the precision of a microsecond, as of July 17, 2022. For a short instance the timestamp was measured in nanoseconds. Image collisions are currently very uncommon. Prior to this, 4chan used 13-digit timestamps at millisecond precision, and collisions were not too hard given you roll the dice enough times. In 2021, ''image swaps'' were not too infrequent on boards like [[/pol/]], [[/v/]] and [[/vg/]], which peaked at 150 posts per minute on a daily basis.<ref>https://4stats.io</ref> | 4chan servers currently index images by a 16-digit [https://en.wikipedia.org/wiki/Unix_time UNIX timestamp]<ref>Visible in the URL of any image</ref> which has the precision of a microsecond, as of July 17, 2022. (For a short instance the timestamp was measured in nanoseconds.{{Citation needed|reason=mentioned on 4chan/History without a source and I can't be assed to dig in the archives right now}}) Image collisions are currently very uncommon. Prior to this, 4chan used 13-digit timestamps at millisecond precision, and collisions were not too hard given you roll the dice enough times. In 2021, ''image swaps'' were not too infrequent on boards like [[/pol/]], [[/v/]] and [[/vg/]], which peaked at 150 posts per minute on a daily basis.<ref>https://4stats.io</ref> | ||
The rarity of the phenomenon makes it hard to study. Conclusions shouldn't be drawn from [[FoolFuuka|archives]], as they often do their own processing, which may change the nature of the image swap, or may even fix it. | The rarity of the phenomenon makes it hard to study. Conclusions shouldn't be drawn from [[FoolFuuka|archives]], as they often do their own processing, which may change the nature of the image swap, or may even fix it. | ||
