https://d.puremagic.com/issues/show_bug.cgi?id=12069
Summary: ctRegex is 3x slower then R-T ?
Product: D
Version: D2
Platform: All
OS/Version: All
Status: NEW
Severity: normal
Priority: P2
Component: Phobos
AssignedTo: [email protected]
ReportedBy: [email protected]
--- Comment #0 from Dmitry Olshansky <[email protected]> 2014-02-03
11:14:04 PST ---
On behalf of Walter Bright, the benchmark:
import std.datetime;
import std.stdio;
import std.regex;
void ct()
{
string phone = "+31 650 903 7158";
//auto phoneReg = regex(r"^\+([1-9][0-9]*) [0-9 ]*$");
static phoneReg = ctRegex!r"^\+([1-9][0-9]*) [0-9 ]*$";
auto m = match(phone, phoneReg);
assert(m);
assert(m.captures[0] == "+31 650 903 7158");
assert(m.captures[1] == "31");
}
void rt()
{
string phone = "+31 650 903 7158";
auto phoneReg = regex(r"^\+([1-9][0-9]*) [0-9 ]*$");
//static phoneReg = ctRegex!r"^\+([1-9][0-9]*) [0-9 ]*$";
auto m = match(phone, phoneReg);
assert(m);
assert(m.captures[0] == "+31 650 903 7158");
assert(m.captures[1] == "31");
}
void main()
{
auto r = benchmark!(ct, rt)(1_000_000);
writefln("ct = %s msecs, rt = %s", r[0].msecs, r[1].msecs);
}
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