[eggy]

Regardless of price, the tech has been around for quite a few years, and it beats the tech mentioned in this article and in most similar articles making similar claims.

As I replied below, I am just surprised that similar technology has not been created by the opensource community that is closer in performance to KDB+.

$25k may seem absurd to you, but if it delivers results 230x faster using 1/250th of the RAM, decision makers in business see the TCO (total cost of ownership) as being worth it. It all depends on your needs and how they are met.

Jd is the commercial database for the opensource language J, that is also fast, and I believe it costs less than KDB, so there are other faster options.

If free as in opensource is your criteria, and not actual cost-benefits analysis, you only have those free choices, but in business time is money, so the 'free' option would be more costly.