The cost of Hash tables | The Backend Engineering Show
Mar 29, 2022•26 min
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Episode description
Hash tables are effective for caching, database joins, sets to check if something is in a list and even load balancing, partitioning and sharding and many other applications. Most programming languages support hash tables. However they don’t come without their cost and limitations lets discuss this.
0:00 Intro
1:50 Arrays
3:50 CPU Cost (NUMA/M1 Ultra)
6:50 Hash Tables
10:00 Hash Join
16:00 Cost of Hash Tables
20:00 Remapping Cost Hash Tables
22:30 Consistent hashing
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