Blog post about new hash table

[zuiderkwast]

The new new hash table is one of the highlights of the upcoming 8.1 release.

• Improve structure and content of the text
• Replace ascii art with other art?
• Decide which benchmarks we want
• Add benchmark results

[madolson]

Overall I think the content is really good. Is @SoftlyRaining planning on adding more information about benchmark results?

[zuiderkwast]

@rjd15372 Do you want to take a look?

[rjd15372]

"The zigzag pattern is because of aliasing between the datapoint spacing
and the memory allocator's discrete allocation sizes."

I couldn't understand what you mean with this. Can you describe it in another way to make it more clear?

[zuiderkwast]

I took this from Rain's issue with the diagrams. :)

It's wasted memory when jemalloc allocates more memory than we need. The sizes are as in this table: http://jemalloc.net/jemalloc.3.html#size_classes

Explaining this is probably not worth it. I'll cut it down to this, ok?

The zigzag pattern is because of unused memory resulting from the memory
allocator's discrete allocation sizes.

[madolson]

Pass for grammar, will auto-apply these changes

[madolson]

I like it.