Jenkins versus BDS false positive rate. Comparison of FP rates between classical hash functions and the functions we used in the BDS. FP rate is plotted as a function of the number of indexed k-mers (in log scale), with k = 33. Plain lines correspond to theoretical predictions for the balanced functions (BDS), whereas star points and triangles correspond to empirical values obtained with simulations using respectively BDS functions and classical hash functions. The combination entitled "BDS 4 functions" is the one chosen for Compareads and is composed of the 3 balanced functions plus one unbalanced.