Oops. Forget to reply to all. ---------- Forwarded message ---------- From: Colin Adams Date: 17 May 2012 08:43 Subject: Re: [Haskell-cafe] Can Haskell outperform C++? To: Roman Werpachowski On 17 May 2012 07:12, Roman Werpachowski wrote:

It depends on what you use the code for. If I run an overnight report for the trading book of my bank in 16 hours, it is not acceptable and is a disaster. If I run it in 8h, it's OK-ish. In business settings, you often have strict deadlines and optimizing the code to be 2x faster can make a huge difference, as you change from missing the deadline to meeting a deadline.

Seconded. I remember once being asked to examine a certain batch program for performance improvements. I spotted an obvious inefficiency, and made a recommendation, which was implemented. It saved something like 10 - 30 minutes on the overnight run (which took hours), so I was disappointed with the result. But the client was delighted, as the run now fitted into the batch window.