I'm doing the way I learned, that is: with a FOR and taking the Index array one by one, but it is leaving too slow, would otherwise convert it to a String? that leaves quicker?
In my case it would be a Dynamic Array of ShortInt.
For example, given this input:
[0,20,-15]
I would like the following output:
0,20,-15
I suspect that your code is slow because it is performing unnecessary reallocations of the string. However, without seeing your code it's hard to be sure.
Probably the simplest way to code your algorithm is to use TStringBuilder. Whether or not that gives sufficient performance, only you can say.
sb := TStringBuilder.Create;
try
for i := 0 to high(buffer) do
begin
sb.Append(IntToStr(buffer[i]));
if i<high(buffer) then
sb.Append(',');
end;
str := sb.ToString;
finally
sb.Free;
end;
%PDF-1.5 %âãÏÓ 43 0 obj <</Linearized 1/L 3016435/O 45/E 1562891/N 2/T 3016048/H [ 479 221]>> endobj 54 0 obj <</DecodeParms<</Columns 5/Predictor 12>>/Filter/FlateDecode/ID[<8BC0AFA464E020A336FE264E96C0FB99><DB35BD3D43DC9E40A3A43FE559A7BFE6>]/Index[43 24]/Info 42 0 R/Length 74/Prev 3016049/Root 44 0 R/Size 67/Type/XRef/W[1 3 1]>>stream hÞbbd```b``Z"O‚ÙÇÁd˜\$Yo}±¹šA$[Xedäo’¿þ†30ÍÙÊIþgÜø À`%PDF-1.5 string looks like the code is behaving well.Array [0] = 0; Array [1] = 150; Array [2] = 30; ... Already in the string would need something like this: String = 0,150,30 ... All concatenated, but using for is getting too slow...
_LStrFromPCharLen implementation and now I understand what do you mean, I will delete my comments in a few seconds :)