e20d7b28bb811000edd0790fb72df9e68875a063,src/gensim/similarities/docsim.py,MatrixSimilarity,getSimilarities,#MatrixSimilarity#Any#,121

Before Change

            vec = matutils.sparse2full(doc, self.numFeatures)
        
        vec.shape = (vec.size, 1)
        if vec.shape != (self.corpus.shape[1], 1):
            raise ValueError("vector shape mismatch; expected %s, got %s" % 
                             ((self.corpus.shape[1], 1,), vec.shape))
        
        // compute cosine similarity against every other document in the collection
        allSims = self.corpus * vec // N x T * T x 1 = N x 1
        allSims = list(allSims.flat) // convert to plain python list
        assert len(allSims) == self.corpus.shape[0] // make sure no document got lost!
        return allSims

After Change

            vec = doc
        else:
            vec = matutils.sparse2full(doc, self.numFeatures)
        vec = numpy.asfortranarray(vec, order = "F", dtype = self.corpus.dtype).reshape(self.numFeatures, 1)
        
        // compute cosine similarity against every other document in the collection
        gemv, = scipy.linalg.get_blas_funcs(("gemv",), (self.u,))
        allSims = gemv(self.corpus, vec) // N x T * T x 1 = N x 1

Instances