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A comment on All Olympic gold medal winners in the 100m sprint compared in one race. Parent comment

Re:All Olympic gold medal winners in the 100m sprint compare... by emp_ on Wednesday August 17, 2016 @11:31PM (#12310254)
Its based on each split.

Found a quora link with more details: [1]

[1] https://www.quora.com/How-is-the-yellow-world-record-line-in...

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Re:All Olympic gold medal winners in the 100m sprint compare... by xeniak on Wednesday August 17, 2016 @11:36PM (#12310274)
So the line is most accurate towards the end of a lap, and probably quite inaccurate at the start (given how much speed you gain during a coming out of a turn).
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Re:All Olympic gold medal winners in the 100m sprint compare... by sleepychu on Thursday August 18, 2016 @04:54AM (#12311189)
That probably works in the favour of the broadcaster if you don't understand how it's calculated. Exciting to see people on the line of the WR.
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