I watched and enjoyed some videos by Summoning Salt showing the progression of speedrun world records. I made some graphs to visualize the improvements and see the difference between RTA and TAS.
The linked R scripts embed the CSV data used to make the graphs.
Other links:
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Focusing just on the RTA, with player names:
Besides Summoning Salt's video, I found a history of world records in this great spreadsheet by Lewis Luo, which I found linked from Paul Bradford's blog.