From: j.romildo@gmail.com
To: caml-list@inria.fr
Subject: record field access
Date: Sat, 21 Oct 2006 00:53:58 -0300 [thread overview]
Message-ID: <20061021035358.GB15596@malaquias.gwiceb1> (raw)
Hello.
Regarding performance, is there any difference in accessing a record
field using pattern matching and using the dot notation?
For instance, given the declarations,
type point = { x: float; y: float }
let sqr x = x *. x
let dist1 p q =
sqrt (sqr (q.x -. p.x) +. sqr (q.y -. p.y))
let dist2 {x=x1; y = y1} {x=x2; y=y2} =
sqrt (sqr (x2 -. x1) +. sqr (y2 -. y1))
what should be preferable: dist1 or dist2?
And to compare records with tuples, given also
let dist3 (x1,y1) (x2,y2) =
sqrt (sqr (x2 -. x1) +. sqr (y2 -. y1))
what should be preferable: dist2 or dist3, regarding performance?
Romildo
next reply other threads:[~2006-10-21 3:54 UTC|newest]
Thread overview: 3+ messages / expand[flat|nested] mbox.gz Atom feed top
2006-10-21 3:53 j.romildo [this message]
2006-10-21 7:23 ` [Caml-list] " Jon Harrop
2006-10-21 14:07 ` Christophe Raffalli
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