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Figure 5
Performance test. The execution time shown as a function of number of grains: dotted line with boxes for [\Delta R = \tan](4°/2), and dotted line with diamonds for [\Delta R = \tan](6°/2). The purity, i.e. the fraction of correctly assigned G vectors (solid line), shows a linear and decreasing dependency on the number of grains, due to an increasing probability that G vectors from other grains will appear close to the expected location.

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