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graphics: Replace copy with for-loop
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@ -44,7 +44,11 @@ func (q *commandQueue) appendVertices(vertices []float32) {
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n := q.verticesNum + len(vertices) - len(q.vertices)
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q.vertices = append(q.vertices, make([]float32, n)...)
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}
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copy(q.vertices[q.verticesNum:q.verticesNum+len(vertices)], vertices)
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// for-loop might be faster than copy:
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// On GopherJS, copy might cause subarray calls.
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for i := 0; i < len(vertices); i++ {
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q.vertices[q.verticesNum+i] = vertices[i]
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}
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q.verticesNum += len(vertices)
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}
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