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ggml: skip excess iteration for pair whose vars same element when i2 == i1 #9177

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ggml: skip excess iteration for pair whose vars same element when i2 == i1 #9177

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2 changes: 1 addition & 1 deletion ggml/src/ggml-quants.c
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Original file line number Diff line number Diff line change
Expand Up @@ -13812,7 +13812,7 @@ static void quantize_row_iq1_s_impl(const float * restrict x, void * restrict vy
float best_score = -FLT_MIN, scale = max;
int besti1 = -1, besti2 = -1, best_shift = 0;
for (int i1 = 0; i1 <= block_size; ++i1) {
for (int i2 = i1; i2 <= block_size; ++i2) {
for (int i2 = i1 + 1; i2 <= block_size; ++i2) {
float sumqx = (sumx[i1] - sumx[0])*x_p[0] + (sumx[i2] - sumx[i1])*x_p[1] + (sumx[block_size] - sumx[i2])*x_p[2];
float sumq2 = (sumw[i1] - sumw[0])*x_p[0]*x_p[0] + (sumw[i2] - sumw[i1])*x_p[1]*x_p[1] + (sumw[block_size] - sumw[i2])*x_p[2]*x_p[2];
if (sumq2 > 0 && sumqx*sumqx > best_score*sumq2) {
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