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<div class="section" id="performance-tips">
<span id="index-0"></span><h1>Performance Tips<a class="headerlink" href="#performance-tips" title="Permalink to this headline">¶</a></h1>
<p>In this chapter we will learn more about the Ring performance.</p>
<div class="section" id="introduction">
<span id="index-1"></span><h2>Introduction<a class="headerlink" href="#introduction" title="Permalink to this headline">¶</a></h2>
<p>Ring is designed to be a simple, small and flexible language in the first place, but also it is fast enough for many applications.</p>
<p>Ring can do each of the next tasks in around 1 second using normal computers in the market during the last 5 years</p>
<ol class="arabic simple">
<li><p>Compiling 100,000 lines of code</p></li>
<li><p>Executing empty loop that count from 1 to 10,000,000</p></li>
<li><p>Executing 1000 search operation using linear search in a list contains 100,000 items, trying to find the last item (The worst case)</p></li>
<li><p>Creating list contains 1,000,000 items then summing all of the list items</p></li>
<li><p>Adding 20,000 items to the ListWidget in GUI applications</p></li>
<li><p>Adding 5,000 nodes to the TreeWidget in GUI applications</p></li>
<li><p>Printing 10,000 messages to the terminal in Console applications</p></li>
</ol>
<p>Also when we need more speed we can use C/C++ extensions!</p>
<p>Example:</p>
<div class="highlight-ring notranslate"><div class="highlight"><pre><span></span><span class="o">?</span> <span class="s">"Create list contains 100,000 items"</span>
<span class="n">aList</span> <span class="o">=</span> <span class="mi">1</span><span class="p">:</span><span class="mi">100000</span>
<span class="o">?</span> <span class="s">"Do 1000 search operation - Find the last item (Worst Case!)"</span>
<span class="n">c</span> <span class="o">=</span> <span class="n">clock</span><span class="p">()</span>
<span class="k">for</span> <span class="n">t</span> <span class="o">=</span> <span class="mi">1</span> <span class="k">to</span> <span class="mi">1000</span>
<span class="n">find</span><span class="p">(</span><span class="n">alist</span><span class="p">,</span><span class="mi">100000</span><span class="p">)</span>
<span class="k">next</span>
<span class="o">?</span> <span class="s">"Time: "</span> <span class="o">+</span> <span class="p">(</span> <span class="n">clock</span><span class="p">()</span> <span class="o">-</span> <span class="n">c</span> <span class="p">)</span> <span class="o">/</span> <span class="n">clockspersecond</span><span class="p">()</span> <span class="o">+</span> <span class="s">" seconds"</span>
</pre></div>
</div>
<p>Output:</p>
<div class="highlight-none notranslate"><div class="highlight"><pre><span></span>Create list contains 100,000 items
Do 1000 search operation - Find the last item (Worst Case!)
Time: 0.87 seconds
</pre></div>
</div>
<p>Example:</p>
<div class="highlight-ring notranslate"><div class="highlight"><pre><span></span><span class="k">load</span> <span class="s">"guilib.ring"</span>
<span class="k">func</span> <span class="n">main</span>
<span class="k">new</span> <span class="n">qApp</span> <span class="p">{</span>
<span class="n">win</span> <span class="o">=</span> <span class="k">new</span> <span class="n">qWidget</span><span class="p">()</span> <span class="p">{</span>
<span class="n">move</span><span class="p">(</span><span class="mi">100</span><span class="p">,</span><span class="mi">100</span><span class="p">)</span> <span class="n">resize</span><span class="p">(</span><span class="mi">500</span><span class="p">,</span><span class="mi">500</span><span class="p">)</span>
<span class="n">setWindowTitle</span><span class="p">(</span><span class="s">"Many Tree Items - Testing Performance"</span><span class="p">)</span>
<span class="kt">tree</span> <span class="o">=</span> <span class="k">new</span> <span class="n">qTreeWidget</span><span class="p">(</span><span class="n">win</span><span class="p">)</span> <span class="p">{</span>
<span class="n">blocksignals</span><span class="p">(</span><span class="kp">True</span><span class="p">)</span> <span class="n">setUpdatesEnabled</span><span class="p">(</span><span class="kp">False</span><span class="p">)</span>
<span class="n">root</span> <span class="o">=</span> <span class="k">new</span> <span class="n">qTreeWidgetItem</span><span class="p">()</span>
<span class="n">root</span><span class="p">.</span><span class="n">setText</span><span class="p">(</span><span class="mi">0</span><span class="p">,</span><span class="s">"The Root Node"</span><span class="p">)</span>
<span class="n">t1</span> <span class="o">=</span> <span class="n">clock</span><span class="p">()</span>
<span class="k">for</span> <span class="n">t</span> <span class="o">=</span> <span class="mi">1</span> <span class="k">to</span> <span class="mi">5000</span>
<span class="n">oItem</span> <span class="o">=</span> <span class="k">new</span> <span class="n">qTreeWidgetItem</span><span class="p">()</span>
<span class="n">oItem</span><span class="p">.</span><span class="n">settext</span><span class="p">(</span><span class="mi">0</span><span class="p">,</span><span class="s">"Item "</span> <span class="o">+</span> <span class="n">t</span><span class="p">)</span>
<span class="n">root</span><span class="p">.</span><span class="n">addchild</span><span class="p">(</span><span class="n">oItem</span><span class="p">)</span>
<span class="k">next</span>
<span class="n">cTime</span> <span class="o">=</span> <span class="p">(</span><span class="n">clock</span><span class="p">()</span><span class="o">-</span><span class="n">t1</span><span class="p">)</span><span class="o">/</span><span class="n">clockspersecond</span><span class="p">()</span>
<span class="n">setHeaderLabel</span><span class="p">(</span><span class="s">"Creating 5000 nodes in "</span> <span class="o">+</span> <span class="n">cTime</span> <span class="o">+</span> <span class="s">" seconds."</span><span class="p">)</span>
<span class="n">addTopLevelItem</span><span class="p">(</span><span class="n">root</span><span class="p">)</span>
<span class="n">expanditem</span><span class="p">(</span><span class="n">root</span><span class="p">)</span>
<span class="n">blocksignals</span><span class="p">(</span><span class="kp">False</span><span class="p">)</span> <span class="n">setUpdatesEnabled</span><span class="p">(</span><span class="kp">True</span><span class="p">)</span>
<span class="p">}</span>
<span class="n">oLayout</span> <span class="o">=</span> <span class="k">new</span> <span class="n">qVBoxLayout</span><span class="p">()</span> <span class="p">{</span>
<span class="n">addWidget</span><span class="p">(</span><span class="kt">tree</span><span class="p">)</span>
<span class="p">}</span>
<span class="n">setLayout</span><span class="p">(</span><span class="n">oLayout</span><span class="p">)</span>
<span class="n">show</span><span class="p">()</span>
<span class="p">}</span>
<span class="n">exec</span><span class="p">()</span>
<span class="p">}</span>
</pre></div>
</div>
<p>Output:</p>
<img alt="Many Tree Items" src="_images/manytreeitems.png" />
</div>
<div class="section" id="creating-lists">
<span id="index-2"></span><h2>Creating Lists<a class="headerlink" href="#creating-lists" title="Permalink to this headline">¶</a></h2>
<p>Example:</p>
<div class="highlight-ring notranslate"><div class="highlight"><pre><span></span><span class="o">?</span> <span class="s">"Create the list using the Range operator"</span>
<span class="n">t1</span> <span class="o">=</span> <span class="n">clock</span><span class="p">()</span>
<span class="n">aList</span> <span class="o">=</span> <span class="mi">1</span><span class="p">:</span><span class="mi">1000000</span>
<span class="o">?</span> <span class="s">"Time : "</span> <span class="o">+</span> <span class="p">((</span><span class="n">clock</span><span class="p">()</span><span class="o">-</span><span class="n">t1</span><span class="p">)</span><span class="o">/</span><span class="n">clockspersecond</span><span class="p">())</span> <span class="o">+</span> <span class="s">" seconds"</span>
<span class="o">?</span> <span class="s">"Create the list using the For loop"</span>
<span class="n">t1</span> <span class="o">=</span> <span class="n">clock</span><span class="p">()</span>
<span class="n">aList</span> <span class="o">=</span> <span class="o">[]</span>
<span class="k">for</span> <span class="n">x</span> <span class="o">=</span> <span class="mi">1</span> <span class="k">to</span> <span class="mi">1000000</span>
<span class="n">aList</span> <span class="o">+</span> <span class="n">x</span>
<span class="k">next</span>
<span class="o">?</span> <span class="s">"Time : "</span> <span class="o">+</span> <span class="p">((</span><span class="n">clock</span><span class="p">()</span><span class="o">-</span><span class="n">t1</span><span class="p">)</span><span class="o">/</span><span class="n">clockspersecond</span><span class="p">())</span> <span class="o">+</span> <span class="s">" seconds"</span>
<span class="o">?</span> <span class="s">"Create the list using the list() function and the For loop"</span>
<span class="n">t1</span> <span class="o">=</span> <span class="n">clock</span><span class="p">()</span>
<span class="n">aList</span> <span class="o">=</span> <span class="kt">list</span><span class="p">(</span><span class="mi">1000000</span><span class="p">)</span>
<span class="k">for</span> <span class="n">x</span> <span class="o">=</span> <span class="mi">1</span> <span class="k">to</span> <span class="mi">1000000</span>
<span class="n">aList</span><span class="o">[</span><span class="n">x</span><span class="o">]</span> <span class="o">=</span> <span class="n">x</span>
<span class="k">next</span>
<span class="o">?</span> <span class="s">"Time : "</span> <span class="o">+</span> <span class="p">((</span><span class="n">clock</span><span class="p">()</span><span class="o">-</span><span class="n">t1</span><span class="p">)</span><span class="o">/</span><span class="n">clockspersecond</span><span class="p">())</span> <span class="o">+</span> <span class="s">" seconds"</span>
</pre></div>
</div>
<p>Output:</p>
<div class="highlight-none notranslate"><div class="highlight"><pre><span></span>Create the list using the Range operator
Time : 0.48 seconds
Create the list using the For loop
Time : 0.79 seconds
Create the list using the list() function and the For loop
Time : 1.56 seconds
</pre></div>
</div>
<div class="admonition note">
<p class="admonition-title">Note</p>
<p>Creating lists using the Range operator is faster than using the For loop or the list() function</p>
</div>
</div>
<div class="section" id="arithmetic-operations">
<span id="index-3"></span><h2>Arithmetic Operations<a class="headerlink" href="#arithmetic-operations" title="Permalink to this headline">¶</a></h2>
<p>Example:</p>
<div class="highlight-ring notranslate"><div class="highlight"><pre><span></span><span class="o">?</span> <span class="s">"Using * operator"</span>
<span class="n">t1</span> <span class="o">=</span> <span class="n">clock</span><span class="p">()</span>
<span class="k">for</span> <span class="n">x</span> <span class="o">=</span> <span class="mi">1</span> <span class="k">to</span> <span class="mi">1000000</span>
<span class="n">out</span> <span class="o">=</span> <span class="n">x</span> <span class="o">*</span> <span class="mi">2</span>
<span class="k">next</span>
<span class="o">?</span> <span class="s">"Time : "</span> <span class="o">+</span> <span class="p">((</span><span class="n">clock</span><span class="p">()</span><span class="o">-</span><span class="n">t1</span><span class="p">)</span><span class="o">/</span><span class="n">clockspersecond</span><span class="p">())</span> <span class="o">+</span> <span class="s">" seconds"</span>
<span class="o">?</span> <span class="s">"Using *= operator"</span>
<span class="n">t1</span> <span class="o">=</span> <span class="n">clock</span><span class="p">()</span>
<span class="k">for</span> <span class="n">x</span> <span class="o">=</span> <span class="mi">1</span> <span class="k">to</span> <span class="mi">1000000</span>
<span class="n">out</span> <span class="o">=</span> <span class="n">x</span>
<span class="n">out</span> <span class="o">*=</span> <span class="mi">2</span>
<span class="k">next</span>
<span class="o">?</span> <span class="s">"Time : "</span> <span class="o">+</span> <span class="p">((</span><span class="n">clock</span><span class="p">()</span><span class="o">-</span><span class="n">t1</span><span class="p">)</span><span class="o">/</span><span class="n">clockspersecond</span><span class="p">())</span> <span class="o">+</span> <span class="s">" seconds"</span>
</pre></div>
</div>
<p>Output:</p>
<div class="highlight-none notranslate"><div class="highlight"><pre><span></span>Using * operator
Time : 1.34 seconds
Using *= operator
Time : 0.47 seconds
</pre></div>
</div>
<div class="admonition note">
<p class="admonition-title">Note</p>
<p>Using the <a href="#id1"><span class="problematic" id="id2">*</span></a>= operator is faster that using the * operator</p>
</div>
</div>
<div class="section" id="using-len-and-for-loops">
<span id="index-4"></span><h2>Using len() and For Loops<a class="headerlink" href="#using-len-and-for-loops" title="Permalink to this headline">¶</a></h2>
<p>Example:</p>
<div class="highlight-ring notranslate"><div class="highlight"><pre><span></span><span class="n">aList</span> <span class="o">=</span> <span class="mi">1</span><span class="p">:</span><span class="mi">1000000</span>
<span class="o">?</span> <span class="s">"Using len() in the For loop"</span>
<span class="n">t1</span> <span class="o">=</span> <span class="n">clock</span><span class="p">()</span>
<span class="k">for</span> <span class="n">x</span> <span class="o">=</span> <span class="mi">1</span> <span class="k">to</span> <span class="n">len</span><span class="p">(</span><span class="n">aList</span><span class="p">)</span>
<span class="k">next</span>
<span class="o">?</span> <span class="s">"Time : "</span> <span class="o">+</span> <span class="p">((</span><span class="n">clock</span><span class="p">()</span><span class="o">-</span><span class="n">t1</span><span class="p">)</span><span class="o">/</span><span class="n">clockspersecond</span><span class="p">())</span> <span class="o">+</span> <span class="s">" seconds"</span>
<span class="o">?</span> <span class="s">"Using len() before the For loop"</span>
<span class="n">t1</span> <span class="o">=</span> <span class="n">clock</span><span class="p">()</span>
<span class="n">nMax</span> <span class="o">=</span> <span class="n">len</span><span class="p">(</span><span class="n">aList</span><span class="p">)</span>
<span class="k">for</span> <span class="n">x</span> <span class="o">=</span> <span class="mi">1</span> <span class="k">to</span> <span class="n">nMax</span>
<span class="k">next</span>
<span class="o">?</span> <span class="s">"Time : "</span> <span class="o">+</span> <span class="p">((</span><span class="n">clock</span><span class="p">()</span><span class="o">-</span><span class="n">t1</span><span class="p">)</span><span class="o">/</span><span class="n">clockspersecond</span><span class="p">())</span> <span class="o">+</span> <span class="s">" seconds"</span>
</pre></div>
</div>
<p>Output:</p>
<div class="highlight-none notranslate"><div class="highlight"><pre><span></span>Using len() in the For loop
Time : 5.50 seconds
Using len() before the For loop
Time : 0.24 seconds
</pre></div>
</div>
<div class="admonition note">
<p class="admonition-title">Note</p>
<p>Using len() before the For loop is faster than using len() in the For loop.</p>
</div>
</div>
<div class="section" id="calling-functions-and-methods">
<span id="index-5"></span><h2>Calling Functions and Methods<a class="headerlink" href="#calling-functions-and-methods" title="Permalink to this headline">¶</a></h2>
<p>Example:</p>
<div class="highlight-ring notranslate"><div class="highlight"><pre><span></span><span class="o">?</span> <span class="s">"calling 100000 functions"</span>
<span class="n">t1</span> <span class="o">=</span> <span class="n">clock</span><span class="p">()</span>
<span class="k">for</span> <span class="n">x</span> <span class="o">=</span> <span class="mi">1</span> <span class="k">to</span> <span class="mi">100000</span>
<span class="n">test</span><span class="p">()</span>
<span class="k">next</span>
<span class="o">?</span> <span class="s">"Time : "</span> <span class="o">+</span> <span class="p">((</span><span class="n">clock</span><span class="p">()</span><span class="o">-</span><span class="n">t1</span><span class="p">)</span><span class="o">/</span><span class="n">clockspersecond</span><span class="p">())</span> <span class="o">+</span> <span class="s">" seconds"</span>
<span class="n">o1</span> <span class="o">=</span> <span class="k">new</span> <span class="n">test</span>
<span class="o">?</span> <span class="s">"calling 100000 methods using the dot operator"</span>
<span class="n">t1</span> <span class="o">=</span> <span class="n">clock</span><span class="p">()</span>
<span class="k">for</span> <span class="n">x</span> <span class="o">=</span> <span class="mi">1</span> <span class="k">to</span> <span class="mi">100000</span>
<span class="n">o1</span><span class="p">.</span><span class="n">test</span><span class="p">()</span>
<span class="k">next</span>
<span class="o">?</span> <span class="s">"Time : "</span> <span class="o">+</span> <span class="p">((</span><span class="n">clock</span><span class="p">()</span><span class="o">-</span><span class="n">t1</span><span class="p">)</span><span class="o">/</span><span class="n">clockspersecond</span><span class="p">())</span> <span class="o">+</span> <span class="s">" seconds"</span>
<span class="o">?</span> <span class="s">"calling 100000 methods using braces "</span>
<span class="n">t1</span> <span class="o">=</span> <span class="n">clock</span><span class="p">()</span>
<span class="k">for</span> <span class="n">x</span> <span class="o">=</span> <span class="mi">1</span> <span class="k">to</span> <span class="mi">100000</span>
<span class="n">o1</span> <span class="p">{</span> <span class="n">test</span><span class="p">()</span> <span class="p">}</span>
<span class="k">next</span>
<span class="o">?</span> <span class="s">"Time : "</span> <span class="o">+</span> <span class="p">((</span><span class="n">clock</span><span class="p">()</span><span class="o">-</span><span class="n">t1</span><span class="p">)</span><span class="o">/</span><span class="n">clockspersecond</span><span class="p">())</span> <span class="o">+</span> <span class="s">" seconds"</span>
<span class="k">func</span> <span class="n">test</span>
<span class="k">class</span> <span class="n">test</span>
<span class="k">func</span> <span class="n">test</span>
</pre></div>
</div>
<p>Output:</p>
<div class="highlight-none notranslate"><div class="highlight"><pre><span></span>calling 100000 functions
Time : 0.28 seconds
calling 100000 methods using the dot operator
Time : 0.36 seconds
calling 100000 methods using braces
Time : 1.19 seconds
</pre></div>
</div>
<div class="admonition note">
<p class="admonition-title">Note</p>
<p>Calling functions is faster than calling methods but the difference is very small.</p>
</div>
<div class="admonition note">
<p class="admonition-title">Note</p>
<p>Using the dot operator to call methods is faster than using braces.</p>
</div>
</div>
</div>
</div>
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