How to speedup file processing?

[Tyro]

Good day all,

running the below code snippet against a 800Kb file takes an ungodly
amount of time (anywhere from 25 to 35 minutes). Is there anything
I can do to speed the process up? 

// Load ID Standards File if no db exists
char[] idfile = cast(char[])read("idfile.ids");

while(idfile.length)
{
	//Avoid utf-8 Error message. Ideal situation would be to 
	//display the contents as it appears in the file but I'm
	// unsure how to accomplish that.
	if(!isascii(idfile[11])) {
		idfile = idfile[80..$];
		continue;
	}

	db.exec("INSERT INTO idstd
		values( null,
		'"~idfile[0..6]~"',   '"~ idfile[6..11] ~"',
		'"~ idfile[11..24] ~"', '"~ idfile[24..38] ~"',
		'"~ idfile[38..40] ~"', '"~ idfile[40..42] ~"',
		'"~ idfile[42..43] ~"', '"~ idfile[43..44] ~"'
	)");
	idfile = idfile[80..$];
}