It's unexpected that the file merging speed of JMP Pro 14 is so much faster than that of JMP Pro 18

lala — Wed, 27 May 2026 11:18:08 GMT

The speed of file splicing has slowed down since JMP Pro 18
I had to use JMP Pro14 again to operate.

dir="C:\0\";;Fs=Files In Directory(dir);
for(j=1,j<=N Items(fs),j++,
d1=Open(dir||fs[j],Add to Recent Files(0));na=d1<<Get Name();
if(j==1,d2=d1;d2<<setName("名2");,current data table(d2);d2<<Concatenate(Data Table(d1),Append to first table);Close(d1,nosave));
);
try(d2<<Delete Table Property("Source"));d2<<Save("D:\0\JMP\big.jmp");

Re: It's unexpected that the file merging speed of JMP Pro 14 is so much faster than that of JMP Pro 18

briancorcoran — Wed, 27 May 2026 12:17:49 GMT

Hello Lala,

Have you tried putting Begin Data Update and End Data Update around the outside of your for loop? This example below is from the Scripting Index.

Brian Corcoran

JMP Development

dt << Begin Data Update;
dt << Add Rows( 2000 );
dt << End Data Update;

topic It's unexpected that the file merging speed of JMP Pro 14 is so much faster than that of JMP Pro 18 in Discussions

It's unexpected that the file merging speed of JMP Pro 14 is so much faster than that of JMP Pro 18

Re: It's unexpected that the file merging speed of JMP Pro 14 is so much faster than that of JMP Pro 18