Benchmark various data structures / algorithms for string searching.
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dhobsd remove murmurhash; it's currently unused
It would be interesting to try out hash tables at some point, but it
introduces some complications. Namely, there are huge numbers of approaches
to hash tables (chaining, linear / quadratic probing, subtypes such as
robin hood hashing, perfect hashes when input set is known up front) and
many tunables to consider:

 * How many buckets to allocate initially?
 * Will the table grow?
 * What is the growth factor?
 * What hash algorithm should we use?

These questions indicate a large number of potential configurations. I would
like to investigate this, but getting results that can be plotted is a higher
priority right now. (Not that this repo is a priority.)
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Benchmarking various datastructures and algorithms for string lookups. For more context, see also:

Running Benchmarks

You'll need a dictionary and possibly to fiddle around with the script.

  • Run make
  • Run ./ [nwords] [nfiles] [depth] [prefix]. If you intend to run more than 1 thread, nfiles must be more than 1. depth controls how deep to make the string. If you specify a prefix, generated strings will all contain that prefix.
  • Run ./bench-[foo] [nthreads] [nwords] to benchmark a particular algorithm.


The reported times contain:

  1. The time it took to parse input, allocate data structures, insert, and find the element just inserted.
  2. The time it took to find items in insertion order.

Times are measured in CPU cycles.

I'm sure there are ways to improve these tests. I'd be interested in contributions for other data structures or other implementations of the same data structures used here.

I'd also be interested in ports to other platforms and results.