wilzbach
commented
8 years ago Comment author: @wilzbach
python -m timeit -v -n 10 -s 'import os' 'os.system("dub run --single --force foo.d")'
10 loops, best of 3: 578 msec per loop
python -m timeit -v -n 10 -s 'import os' 'os.system("rdmd --force foo.d")'
10 loops, best of 3: 730 msec per loop
I used an example from the DLang Tour (see below or http://tour.dlang.io/tour/en/gems/template-meta-programming) and tested with more and the overhead seems to stay there:
== Associative arrays ==
http://tour.dlang.io/tour/en/basics/associative-arrays
rdmd 5 loops, best of 3: 637 msec per loop dub: 5 loops, best of 3: 584 msec per loop
== Loops ==
http://tour.dlang.io/tour/en/basics/loops
rdmd: 5 loops, best of 3: 488 msec per loop dub: 5 loops, best of 3: 373 msec per loop
!/usr/bin/env rdmd
/+ dub.sdl: name "foo" +/
import std.traits: isFloatingPoint; import std.uni: toUpper; import std.string: format; import std.stdio: writeln;
/// A Vector that just works for /// numbers, integers or floating points. struct Vector3(T) if (is(T: real)) { private: T x,y,z;
/// Generator for getter and setter because
/// we really hate boiler plate!
///
/// var -> T getVAR() and void setVAR(T)
mixin template GetterSetter(string var) {
// Use mixin to construct function
// names
mixin("T get%s() const { return %s; }"
.format(var.toUpper, var));
mixin("void set%s(T v) { %s = v; }"
.format(var.toUpper, var));
}
// Easily generate our getX, setX etc.
// functions with a mixin template.
mixin GetterSetter!"x";
mixin GetterSetter!"y";
mixin GetterSetter!"z";public: // We don't allow the dot function // for anything but floating points static if (isFloatingPoint!T) { T dot(Vector3!T rhs) { return xrhs.x + yrhs.y + z*rhs.z; } } }
void main() { auto vec = Vector3!double(3,3,3); // That doesn't work because of the template // constraint! // Vector3!string illegal;
auto vec2 = Vector3!double(4,4,4);
writeln("vec dot vec2 = ", vec.dot(vec2));
auto vecInt = Vector3!int(1,2,3);
// doesn't have the function dot because
// we statically enabled it only for float's
// vecInt.dot(Vector3!int(0,0,0));
// generated getter and setters!
vecInt.setX(3);
vecInt.setZ(1);
writeln(vecInt.getX, ",",
vecInt.getY, ",", vecInt.getZ);}
Note: the issue was created automatically migrated from https://issues.dlang.org
Original bug ID: BZ#16431 From: @wilzbach Reported version: D2 CC: ag0aep6g@gmail.com, andrej.mitrovich@gmail.com, johnnymarler@gmail.com