Changeset 337

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Timestamp:
06/21/08 00:17:44 (4 years ago)
Author:
simon
Message:

Ints.

Location:
hodgestar/Talks/PythonObjects
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2 added
7 modified

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  • hodgestar/Talks/PythonObjects/html/pyobjects-0.html

    r334 r337  
    1212<li><a href='pyobjects-3.html'>Strings</a></li> 
    1313<li><a href='pyobjects-4.html'>Find Big Dict</a></li> 
    14 <li><a href='pyobjects-5.html'>Gamboling With Slots</a></li> 
    15 <li><a href='pyobjects-6.html'>PyObject C API</a></li> 
    16 <li><a href='pyobjects-7.html'>object.c</a></li> 
    17 <li><a href='pyobjects-8.html'>New Python Documents - ZOMG!</a></li> 
     14<li><a href='pyobjects-5.html'>Ints</a></li> 
     15<li><a href='pyobjects-6.html'>Int (speed)</a></li> 
     16<li><a href='pyobjects-7.html'>Gamboling With Slots</a></li> 
     17<li><a href='pyobjects-8.html'>PyObject C API</a></li> 
     18<li><a href='pyobjects-9.html'>object.c</a></li> 
     19<li><a href='pyobjects-10.html'>New Python Documents - ZOMG!</a></li> 
    1820</ol> 
    1921<br /></body></html> 

  • hodgestar/Talks/PythonObjects/html/pyobjects-3.html

    r332 r337  
    2727 
    2828<li>Constants strings of size &lt;= 20 cache by parser (TODO: check).</li> 
     29 
     30<li>PyString_InternInPlace (PyUnicode_InternInPlace in 3.0) results in strings being stored in internal dictionary.<ul><li>Reference in interned not counted in reference count (nasty hack to hide this from users).</li> 
     31</ul></li> 
     32 
     33<li>Strings are replaced by Unicode in 3.0</li> 
    2934</ul> 
    3035<br /><div class="footer"><hr />Everything You Didn't Want to Known About Python Objects</div></body></html> 

  • hodgestar/Talks/PythonObjects/html/pyobjects-5.html

    r333 r337  
    66</head> 
    77<body> 
    8 <a accesskey="P" href="pyobjects-4.html">Prev</a> | <a href="pyobjects-0.html">Index</a> | <a acesskey="N" href="pyobjects-6.html">Next</a><h2>Gamboling With Slots</h2><ul> 
     8<a accesskey="P" href="pyobjects-4.html">Prev</a> | <a href="pyobjects-0.html">Index</a> | <a acesskey="N" href="pyobjects-6.html">Next</a><h2>Ints</h2><ul> 
     9<li>For efficiency, ints are not malloc'ed singly but in PyIntBlocks.</li> 
     10 
     11<li>Ints are replaced by Longs in 3.0 -- malloc list is gone.</li> 
     12 
     13<li><div class="highlight"><pre><span class="go">Python 2.6a3+ (trunk:64269M, Jun 14 2008, 11:36:56) </span> 
     14<span class="gp">&gt;&gt;&gt; </span><span class="n">util</span><span class="o">.</span><span class="n">memory</span><span class="p">()</span> 
     15<span class="go">5849088.0</span> 
     16<span class="gp">&gt;&gt;&gt; </span><span class="n">z</span> <span class="o">=</span> <span class="nb">list</span><span class="p">(</span><span class="nb">range</span><span class="p">(</span><span class="mf">1000000</span><span class="p">))</span> 
     17<span class="gp">&gt;&gt;&gt; </span><span class="n">util</span><span class="o">.</span><span class="n">memory</span><span class="p">()</span> 
     18<span class="go">22380544.0</span> 
     19<span class="gp">&gt;&gt;&gt; </span><span class="k">del</span> <span class="n">z</span> 
     20<span class="gp">&gt;&gt;&gt; </span><span class="n">util</span><span class="o">.</span><span class="n">memory</span><span class="p">()</span> 
     21<span class="go">17879040.0</span> 
     22</pre></div> 
     23</li> 
     24 
     25<li><div class="highlight"><pre><span class="go">Python 3.0a5+ (py3k:64080, Jun 10 2008, 18:22:21)</span> 
     26<span class="gp">&gt;&gt;&gt; </span><span class="n">util</span><span class="o">.</span><span class="n">memory</span><span class="p">()</span> 
     27<span class="go">9302016.0</span> 
     28<span class="gp">&gt;&gt;&gt; </span><span class="n">z</span> <span class="o">=</span> <span class="nb">list</span><span class="p">(</span><span class="nb">range</span><span class="p">(</span><span class="mf">1000000</span><span class="p">))</span> 
     29<span class="gp">&gt;&gt;&gt; </span><span class="n">util</span><span class="o">.</span><span class="n">memory</span><span class="p">()</span> 
     30<span class="go">29011968.0</span> 
     31<span class="gp">&gt;&gt;&gt; </span><span class="k">del</span> <span class="n">z</span> 
     32<span class="gp">&gt;&gt;&gt; </span><span class="n">util</span><span class="o">.</span><span class="n">memory</span><span class="p">()</span> 
     33<span class="go">9302016.0</span> 
     34</pre></div> 
     35</li> 
    936</ul> 
    1037<br /><div class="footer"><hr />Everything You Didn't Want to Known About Python Objects</div></body></html> 

  • hodgestar/Talks/PythonObjects/html/pyobjects-6.html

    r335 r337  
    66</head> 
    77<body> 
    8 <a accesskey="P" href="pyobjects-5.html">Prev</a> | <a href="pyobjects-0.html">Index</a> | <a acesskey="N" href="pyobjects-7.html">Next</a><h2>PyObject C API</h2><ul> 
    9 <li>List of methods unchanged between 2.5 and 2.6</li> 
     8<a accesskey="P" href="pyobjects-5.html">Prev</a> | <a href="pyobjects-0.html">Index</a> | <a acesskey="N" href="pyobjects-7.html">Next</a><h2>Int (speed)</h2><ul> 
     9<li><div class="highlight"><pre><span class="go">$ ./python -m timeit &quot;list(x for x in range(2**30,2**30+1000))&quot;</span> 
     10<span class="go">10000 loops, best of 3: 176 usec per loop</span> 
     11<span class="go">$ ../py3k/python -m timeit &quot;list(x for x in range(2**30,2**30+1000))&quot;</span> 
     12<span class="go">1000 loops, best of 3: 202 usec per loop</span> 
     13<span class="go">$ ./python -m timeit &quot;list(x for x in range(2**37,2**37+1000))&quot;</span> 
     14<span class="go">1000 loops, best of 3: 311 usec per loop</span> 
     15<span class="go">$ ../py3k/python -m timeit &quot;list(x for x in range(2**37,2**37+1000))&quot;</span> 
     16<span class="go">1000 loops, best of 3: 431 usec per loop</span> 
     17<span class="go">$ ./python -m timeit &quot;list(x for x in range(2**63,2**63+1000))&quot;</span> 
     18<span class="go">1000 loops, best of 3: 320 usec per loop</span> 
     19<span class="go">$ ../py3k/python -m timeit &quot;list(x for x in range(2**63,2**63+1000))&quot;</span> 
     20<span class="go">1000 loops, best of 3: 439 usec per loop</span> 
     21</pre></div> 
     22</li> 
    1023</ul> 
    1124<br /><div class="footer"><hr />Everything You Didn't Want to Known About Python Objects</div></body></html> 

  • hodgestar/Talks/PythonObjects/html/pyobjects-7.html

    r334 r337  
    66</head> 
    77<body> 
    8 <a accesskey="P" href="pyobjects-6.html">Prev</a> | <a href="pyobjects-0.html">Index</a> | <a acesskey="N" href="pyobjects-8.html">Next</a><h2>object.c</h2><ul> 
    9 <li><img src='tabs.png' alt='' /></li> 
     8<a accesskey="P" href="pyobjects-6.html">Prev</a> | <a href="pyobjects-0.html">Index</a> | <a acesskey="N" href="pyobjects-8.html">Next</a><h2>Gamboling With Slots</h2><ul> 
    109</ul> 
    1110<br /><div class="footer"><hr />Everything You Didn't Want to Known About Python Objects</div></body></html> 

  • hodgestar/Talks/PythonObjects/html/pyobjects-8.html

    r335 r337  
    66</head> 
    77<body> 
    8 <a accesskey="P" href="pyobjects-7.html">Prev</a> | <a href="pyobjects-0.html">Index</a> | Next<h2>New Python Documents - ZOMG!</h2><ul> 
    9 <li>Interactive search -- in static HTML.</li> 
    10  
    11 <li>_static/searchindex.json</li> 
    12  
    13 <li><a href="file:///home/simon/LocalProjects/PythonSpint/trunk/Doc/build/html/index.html">file:///home/simon/LocalProjects/PythonSpint/trunk/Doc/build/html/index.html</a></li> 
     8<a accesskey="P" href="pyobjects-7.html">Prev</a> | <a href="pyobjects-0.html">Index</a> | <a acesskey="N" href="pyobjects-9.html">Next</a><h2>PyObject C API</h2><ul> 
     9<li>List of methods unchanged between 2.5 and 2.6</li> 
    1410</ul> 
    1511<br /><div class="footer"><hr />Everything You Didn't Want to Known About Python Objects</div></body></html> 

  • hodgestar/Talks/PythonObjects/pyobjects.py

    r335 r337  
    1 from slides import Lecture, Slide, TitleSlide, Bullet, PRE, URL, Image, cgi 
     1from slides import Lecture, Slide, TitleSlide, Bullet, PRE, URL, Image, SubBullet, cgi 
    22from pygments.lexers import get_lexer_by_name 
    33from pygments.formatters import get_formatter_by_name 
    … …  
    103103        Bullet("Single characters and empty string held in permament cache (Objects/stringobject.c)."), 
    104104        Bullet("Constants strings of size <= 20 cache by parser (TODO: check)."), 
     105        Bullet("PyString_InternInPlace (PyUnicode_InternInPlace in 3.0) results in strings being stored in internal dictionary.", 
     106            SubBullet( 
     107                Bullet("Reference in interned not counted in reference count (nasty hack to hide this from users)."), 
     108            ), 
     109        ), 
     110        Bullet("Strings are replaced by Unicode in 3.0"), 
    105111    ), 
    106112    Slide("Find Big Dict", 
    … …  
    119125            >>> import util 
    120126            >>> util.keyword_quiz() 
     127        """)), 
     128    ), 
     129    Slide("Ints", 
     130        Bullet("For efficiency, ints are not malloc'ed singly but in PyIntBlocks."), 
     131        Bullet("Ints are replaced by Longs in 3.0 -- malloc list is gone."), 
     132        Bullet(PYCON(""" 
     133            Python 2.6a3+ (trunk:64269M, Jun 14 2008, 11:36:56)  
     134            >>> util.memory() 
     135            5849088.0 
     136            >>> z = list(range(1000000)) 
     137            >>> util.memory() 
     138            22380544.0 
     139            >>> del z 
     140            >>> util.memory() 
     141            17879040.0 
     142        """)), 
     143        Bullet(PYCON(""" 
     144            Python 3.0a5+ (py3k:64080, Jun 10 2008, 18:22:21) 
     145            >>> util.memory() 
     146            9302016.0 
     147            >>> z = list(range(1000000)) 
     148            >>> util.memory() 
     149            29011968.0 
     150            >>> del z 
     151            >>> util.memory() 
     152            9302016.0 
     153        """)), 
     154    ), 
     155    Slide("Int (speed)", 
     156        Bullet(PYCON(""" 
     157            $ ./python -m timeit "list(x for x in range(2**30,2**30+1000))" 
     158            10000 loops, best of 3: 176 usec per loop 
     159            $ ../py3k/python -m timeit "list(x for x in range(2**30,2**30+1000))" 
     160            1000 loops, best of 3: 202 usec per loop 
     161            $ ./python -m timeit "list(x for x in range(2**37,2**37+1000))" 
     162            1000 loops, best of 3: 311 usec per loop 
     163            $ ../py3k/python -m timeit "list(x for x in range(2**37,2**37+1000))" 
     164            1000 loops, best of 3: 431 usec per loop 
     165            $ ./python -m timeit "list(x for x in range(2**63,2**63+1000))" 
     166            1000 loops, best of 3: 320 usec per loop 
     167            $ ../py3k/python -m timeit "list(x for x in range(2**63,2**63+1000))" 
     168            1000 loops, best of 3: 439 usec per loop 
    121169        """)), 
    122170    ),