On 12/7/17 8:11 PM, Mengu wrote:
On Thursday, 7 December 2017 at 22:39:44 UTC, Daniel Kozak wrote:
The other slowdown is caused by concatenation. Because std::string +=
is more simillar to std.array.(Ref)Appender
wait, i thought appenders performed better than concatenation. is that
not true or did i just misunderstand your post?
You misunderstood. Appender is faster than ~= to a straight array,
because it doesn't have to do any opaque lookups in the GC to see if it
needs to reallocate -- all the information is right there.
Daniel's point was that Appender is more akin to std::string (which
doesn't have the benefit of having language-defined array operaions). If
the blogger used Appender, he would have had better performance.
-Steve
