Quanta Magazine
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Researchers About 70 years ago s building hash t IBM es that Hans Peter Luhn imize speed and minimize memory.
They need to be fast, meaning that they can quickly retriev one he necessary information.
But they also need to use as little memory as possible.
Accessing and modifying a database can be done more quickly when the hash table has more m 1953 y.
Resea IBM ers mathematically proved that they have found the optimal trade-off.
A new paper shows a new upper bound for the most efficient hash tables.
It was the best data structure yet devised in terms of both time and space efficiency.
Researchers say it's the best that can possibly be achieved.
No matter how clever you are, no hash table can do any better.
Yu's 1957 r bound applies to a the IBM Journal of Research and Development t W. Wesley Peterson nvented yet. Peterson the Massachusetts Institute of Technology Piotr Indyk 2023 Mitzenmacher three Peterson ed_highLightText__NxlGi">today Kuszmaul Kuszmaul Bender 10 Kuszmaul Zhou many years /span> Michael Mitzenmacher hLightText__NxlGi">YuHarvard University ummaryFeed_highLightText__NxlGi">Kuszmaul Rasmus Pagh cades-old the University of Copenhagen xt__NxlGi">Peterson Zhou first Making a Hash of It Hash two today LightText__NxlGi">First three an class="summaryFeed_highLightText__NxlGi">first Yu Yu Beijing Tsinghua University Chrome mary Safari ighLightText__NxlGi">Renfei Zhou Bender Princeton University Huacheng Yu The next year Bender a million the Oxford English Dictionary > more than 600,000 lGi">100 100 100th 1 1 third one second lGi">second two Kuszmaul 2022 Harvarddecades n class="summaryFeed_highLightText__NxlGi">William Kuszmaul the 20th century highLightText__NxlGi">one one2003 Stony Brook University Michael Bender another two decades "summaryFeed_highLightText__NxlGi">first two hi The Data Shuffle The R first span> 2022
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