LocalStorage Speed - macmcmeans/localDataStorage GitHub Wiki

The data from localStorage is stored in an SQLite database on the user's filesystem. Read operations are generally considered very quick.

Some benchmarks compare the speed of disk-based IO to the efficiency of reading and writing to memory. Even with SSD hardware, how will any filesystem be comparable to direct memory? In automotive terms, it's like comparing the performance of a Chevy Chevette to a Lamborghini, and then railing at the Chevette for being slower.

How could it be otherwise?

If the raw speed of localStorage by itself is unsatisfactory, you'll get no further joy using locaDataStorage. The convenience factor of data type tracking, string compression, etc. comes at a cost, and read/write times will be minimally slower compared to using the native API without a wrapper.

For ultimate speed, localDataStorage lets you use Memory Keys. However, change events are not triggered.