freq = freq[:256] // eliminate bounds check for freq[c] below
	clear(freq)
	for _, c := range text {
		freq[c]++
	}
	return freq
}

// bucketMin_8_32 stores into bucket[c] the minimum index
// in the bucket for character c in a bucket-sort of text.
func bucketMin_8_32(text []byte, freq, bucket []int32) {
	freq = freq_8_32(text, freq, bucket)
	freq = freq[:256]     // establish len(freq) = 256, so 0 ≤ i < 256 below