monomorphism is a property of a programming language which sets a default type if there is no type specified, and coerces to a new type based on the later usage of the variable
Monomorphism is the opposite of polymorphism, which means that it morphs an untyped object to a single type.
I've been reading some articles on change detection, and all of them say that monomorphic functions are much faster than polymorphic. For example, here is a quote:
(..)The reason for that is, that it has to be written in a dynamic way, so
it can…
I am asking this question with refernce to this SO question.
Accepted answer by Don stewart : First line says "Your code is highly polymorphic change all float vars to Double .." and it gives 4X performance improvement.
I am interested in doing…
In one of the projects I've worked on, the subject of isomorphism versus monomorphism came up.
A little background: I'm no expert on graph theory and have no formal training in it. But this topic is very important in chemistry, where chemists expect…
I've noticed that implementing polymorphic recursive types in languages that perform code monomorphization (for e.g: C++, Rust, etc.) is very difficult, if not impossible. This is usually because the compiler needs to generate code for every…
I'm a Haskell and a Stackoverflow noob, and here's my
first & probably quite basic Haskell question.
module M where
import Data.HList
data R r a
r1 = undefined :: R a Int
r2 = undefined :: R a Double
rPair :: R r a -> R r b -> (R r a, R r…
I've got some code using types to disambiguate instances (the real code is using GHC.TypeLits singletons for type tags, but I don't think that's germane) and I'd like to use a let binding to avoid text-level duplication; unfortunately, this…
Question for v8 experts.
Recently, I've discovered the situation with polymorphism in v8. It is that polymorphism is well-optimized only up to the 4 object "shapes", after which the performance degrades significantly. Classes and object inheritance…
I was following some examples on F# Wikibook on High Order Functions.
Second code snippet under title, Composition Function has following code snippet.
#light
open System
let compose f g x = f (g x)
let xSquared x = x*x
let negXPlusFive x = -x/2.0…
I have a question on
"Implicit parameters and polymorphic recursion" chapter of GHC User Guide.
The code is
len1 :: [a] -> Int
len1 xs = let ?acc = 0 in len_acc1 xs
len_acc1 [] = ?acc
len_acc1 (_:xs) = let ?acc = ?acc + (1::Int) in len_acc1…
I'm using the Haxl library and I'm trying to implement fetchHTML concurrently:
import Data.Aeson
import Control.Concurrent.Async
import Control.Concurrent.QSem
import Haxl.Core
import Haxl.Prelude
instance DataSource' u HTTPRequest where
fetch =…
Well, actually it's not a problem since I solved it but it bothers me too much :
Let's write this :
test.ml
type bop = Beq | Bneq | Badd
type value = Vint of int | Vchar of char
let eval bop a b =
let op = match bop with
| Beq -> (=)
…
I have project that build with cargo workspace with including lot of crates.
One of the lower level crates contains generic data-structure with a lot of serde-code involved.
In order to reduce the compile time , I tried to crate objects with…
If I understand correctly, in Rust every closure type has a unique type that cannot be written out. I also thought this applied to functions, however, I'm able to do the following, in which I explicitly write the type parameter in the return types…
I'm trying to write my own type inference algorithm for a toy language, but I'm running into a wall - I think algorithm W can only be used for excessively general types.
Here are the expressions:
Expr ::= EAbs String Expr
| EApp Expr Expr
…
module MapHelpers (Ord : Map.OrderedType) = struct
include Map.Make (Ord)
let add_all a b = fold add a b
end
works but the seemingly equivalent
module MapHelpers (Ord : Map.OrderedType) = struct
include Map.Make (Ord)
let add_all = fold…
