畳ã¿è¾¼ã¿ãƒ‹ãƒ¥ãƒ¼ãƒ©ãƒ«ãƒãƒƒãƒˆã‚’高速化ã™ã‚‹ãŸã‚ã®ã„ã‚ã„ã‚ - SmartNews Engineering Blog$$ \begin{bmatrix} d_0 d_1 d_2 \\ d_1 d_2 d_3 \end{bmatrix} \begin{bmatrix} g_0 \\ g_1 \\ g_2 \end{bmatrix} = \begin{bmatrix} m_1 + m_2 + m_3 \\ m_2 - m_3 - m_4\\ \end{bmatrix} $$ ãŸã ã—ã€$m_1 = (d_0 - d_2) g_0, m_2 = (d_1 + d_2) \frac{g_0 + g_1 + g_2}{2}, m_3 = (d_2 - d_1) \frac{g_0 - g_1 + g_2}{2}, m_4 = (d_1 - d_3) g_2$ã§ã™ã€‚ ãªã«ãŒãªã‚“ã ã‹ã‚ã‹ã‚‰ãªã„ã€ã¨ã„ã†å£°ãŒã“ã“ã¾ã§èžã“ãˆã¦æ¥ã‚‹ã‚ˆã†ãªæ°—ã™ã‚‰ã—ã¾ã™ãŒã€ãã‚Œã¯ã¨ã‚‚ã‹ãã€$m_1 + m_2 + m_3$ã«ä¸Šè¨˜ã®å®šç¾©ã‚’入れã¦è¨ˆç®—
IDEA * IDEA
最低2秒ã€ç›®æŒ‡ã™ã¯1秒以内。ウェブサイトを高速化ã™ã‚‹ãŸã‚ã®TIPS at #SMX Advanced Seattle 2012
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