sprintf() of gawk in cvs works very slow under ja_JP.UTF8

[Hirofumi Saito]

Hello,

The sprintf() function of latest gawk in CVS is very very slow.
I've checked the script below.

$ cat test.awk 
BEGIN {
    str = "abc";
    for (i = 1; i <= 10000; i++) {
        result = sprintf("%s%s", result, str);
    }
    print result;
}

$ time gawk -f test.awk > /dev/null 
gawk -f test.awk > /dev/null  7.61s user 0.01s system 99% cpu 7.674 total

But under C locale, it works very fast (over 100 times faster!!).

$ time LC_ALL=C gawk -f test.awk > /dev/null
LC_ALL=C gawk -f test.awk > /dev/null  0.05s user 0.00s system 18% cpu 0.301 
total

The release version of gawk-3.1.6 works fast under ja_JP.UTF8.

$ time ../gawk-3.1.6/gawk -f test.awk > /dev/null 
../gawk-3.1.6/gawk -f test.awk > /dev/null  0.05s user 0.00s system 95% cpu 
0.056 total

regards,

Hirofumi Saito.