[Lxml-checkins] r54107 - in lxml/trunk: . benchmark doc

[scoder at codespeak.net]

Author: scoder
Date: Thu Apr 24 22:04:27 2008
New Revision: 54107

Modified:
   lxml/trunk/   (props changed)
   lxml/trunk/benchmark/bench_etree.py
   lxml/trunk/doc/performance.txt
Log:
 r4058 at delle:  sbehnel | 2008-04-24 15:48:15 +0200
 some more benchmark results on text serialisation


Modified: lxml/trunk/benchmark/bench_etree.py
==============================================================================
--- lxml/trunk/benchmark/bench_etree.py	(original)
+++ lxml/trunk/benchmark/bench_etree.py	Thu Apr 24 22:04:27 2008
@@ -51,6 +51,13 @@
     @with_attributes(False)
     @with_text(text=True, utext=True)
     @onlylib('lxe')
+    def bench_tostring_text_unicode(self, root):
+        self.etree.tostring(root, method="text", encoding=unicode)
+
+    @nochange
+    @with_attributes(False)
+    @with_text(text=True, utext=True)
+    @onlylib('lxe', 'ET')
     def bench_tostring_text_utf16(self, root):
         self.etree.tostring(root, method="text", encoding='UTF-16')
 
@@ -65,15 +72,6 @@
                                 encoding='UTF-8', with_tail=True)
 
     @nochange
-    @with_attributes(False)
-    @with_text(text=True, utext=True)
-    @onlylib('lxe')
-    @children
-    def bench_tostring_text_unicode(self, children):
-        for child in children:
-            self.etree.tostring(child, method="text", encoding=unicode)
-
-    @nochange
     @with_attributes(True, False)
     @with_text(text=True, utext=True)
     def bench_tostring_utf8(self, root):

Modified: lxml/trunk/doc/performance.txt
==============================================================================
--- lxml/trunk/doc/performance.txt	(original)
+++ lxml/trunk/doc/performance.txt	Thu Apr 24 22:04:27 2008
@@ -129,8 +129,8 @@
 executes entirely at the C level, without any interaction with Python
 code.  The results are rather impressive, especially for UTF-8, which
 is native to libxml2.  While 20 to 40 times faster than (c)ElementTree
-1.2, lxml is still more than 7 times as fast as the much improved
-ElementTree 1.3::
+1.2 (which is part of the standard library in Python 2.5), lxml is
+still more than 7 times as fast as the much improved ElementTree 1.3::
 
   lxe: tostring_utf16  (SATR T1)   25.7590 msec/pass
   cET: tostring_utf16  (SATR T1)  179.6291 msec/pass
@@ -155,11 +155,25 @@
 The same applies to plain text serialisation.  Note that cElementTree
 does not currently support this, as it is new in ET 1.3::
 
-  lxe: tostring_text_ascii   (S-TR T1)    4.5149 msec/pass
-  ET : tostring_text_ascii   (S-TR T1)   87.6551 msec/pass
+  lxe: tostring_text_ascii     (S-TR T1)    3.8729 msec/pass
+  ET : tostring_text_ascii     (S-TR T1)   90.7841 msec/pass
 
-  lxe: tostring_text_ascii   (S-TR T3)    1.2901 msec/pass
-  ET : tostring_text_ascii   (S-TR T3)   27.5211 msec/pass
+  lxe: tostring_text_ascii     (S-TR T3)    1.1508 msec/pass
+  ET : tostring_text_ascii     (S-TR T3)   28.0581 msec/pass
+
+  lxe: tostring_text_utf16     (S-TR T1)    5.6219 msec/pass
+  ET : tostring_text_utf16     (S-TR T1)   87.4891 msec/pass
+
+  lxe: tostring_text_utf16     (U-TR T1)    7.0660 msec/pass
+  ET : tostring_text_utf16     (U-TR T1)   82.1049 msec/pass
+
+Unlike ElementTree, the ``tostring()`` function in lxml also supports
+serialisation to a Python unicode string object::
+
+  lxe: tostring_text_unicode   (S-TR T1)    4.2419 msec/pass
+  lxe: tostring_text_unicode   (U-TR T1)    5.2760 msec/pass
+  lxe: tostring_text_unicode   (S-TR T3)    1.3049 msec/pass
+  lxe: tostring_text_unicode   (U-TR T3)    1.4210 msec/pass
 
 For parsing, on the other hand, the advantage is clearly with
 cElementTree.  The (c)ET libraries use a very thin layer on top of the