simple

First a few simple programs.

Half are naive line-by-line transliterations from the original C program; others are old initial 2004 and 2005 programs from the archives. The current Ruby mandelbrot multicore programs are 7x faster than this simple Ruby transliteration; and the exhaustively-optimised + multicore + vector-instruction C programs are more-like 25x faster than this simple C program.

source	secs	mem	gz
Intel C	23.62	20,580	433
C gcc #2	25.04	19,708	412
C gcc	26.30	19,708	433
Go #2	26.67	19,808	500
C# .NET	27.23	32,036	493
Go	27.30	19,808	469
Java	29.28	43,792	445
PHP #3	127.57	19,804	418
PHP #2	156.45	19,804	397
PHP	167.49	19,804	390
Java -Xint	8 min	35,168	445
Ruby yjit #2	19 min	21,248	313
Ruby yjit	20 min	20,992	341
Python 3 #3	20 min	19,660	392
Toit	28 min	68,992	387
Python 3 #2	28 min	19,660	337
Python 3	56 min	19,660	380
Matz's Ruby	2h 39 min	19,680	341
Matz's Ruby #2	3h 06 min	19,860	313

Transliterations are obviously not idiomatic — does that matter for your purposes? When the archive Ruby #2 and Python #2 programs are most idiomatic they are furthest from identical — are they similar-enough to be comparable for your purposes? (The archive Python #2 program uses a built-in complex-number type.)

Differences in approach — to memory management, parallel programming, regex, arbitrary precision arithmetic, implementation technique — are part and parcel of using different programming languages.

The optimised mandelbrot programs are far from identical — does that matter for your purposes?

Then — As fast as C?

Now — As fast as SSE and AVX instructions?