config: Speed up ACO & sorcery initialization
When starting Asterisk in the foreground, there is a perceptible delay when loading modules that use the ACO and sorcery config frameworks. For example, a lightly configured res_pjsip took 853ms to load on my VM. I tracked down the slowness to the XPath queries used to associate the relevant documentation with the config options. One improvement was adding a call to xmlXPathOrderDocElems after loading an XML document. From the libxml2 docs: Call this routine to speed up XPath computation on static documents. The second change was to remove recursive descent and wildcard operators from the XPath queries. After these changes, res_pjsip takes 85ms to load on my VM and there is no longer a perceptible delay when starting Asterisk in the foreground. Change-Id: I45d457f1580e26bf5a2b0dab16e8e9ae46dcbd82
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@ -998,11 +998,11 @@ static int xmldoc_update_config_type(const char *module, const char *name, const
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/* If we already have a syntax element, bail. This isn't an error, since we may unload a module which
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* has updated the docs and then load it again. */
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if ((results = ast_xmldoc_query("//configInfo[@name='%s']/*/configObject[@name='%s']/syntax", module, name))) {
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if ((results = ast_xmldoc_query("/docs/configInfo[@name='%s']/configFile/configObject[@name='%s']/syntax", module, name))) {
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return 0;
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}
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if (!(results = ast_xmldoc_query("//configInfo[@name='%s']/*/configObject[@name='%s']", module, name))) {
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if (!(results = ast_xmldoc_query("/docs/configInfo[@name='%s']/configFile/configObject[@name='%s']", module, name))) {
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ast_log(LOG_WARNING, "Cannot update type '%s' in module '%s' because it has no existing documentation!\n", name, module);
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return XMLDOC_STRICT ? -1 : 0;
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}
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@ -1068,7 +1068,7 @@ static int xmldoc_update_config_option(struct aco_type **types, const char *modu
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return XMLDOC_STRICT ? -1 : 0;
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}
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if (!(results = ast_xmldoc_query("//configInfo[@name='%s']/*/configObject[@name='%s']/configOption[@name='%s']", module, object_name, name))) {
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if (!(results = ast_xmldoc_query("/docs/configInfo[@name='%s']/configFile/configObject[@name='%s']/configOption[@name='%s']", module, object_name, name))) {
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ast_log(LOG_WARNING, "Could not find option '%s' with type '%s' in module '%s'\n", name, object_name, module);
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return XMLDOC_STRICT ? -1 : 0;
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}
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@ -96,6 +96,9 @@ struct ast_xml_doc *ast_xml_open(char *filename)
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ast_log(LOG_NOTICE, "XSLT support not found. XML documentation may be incomplete.\n");
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#endif /* HAVE_LIBXSLT */
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/* Optimize for XPath */
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xmlXPathOrderDocElems(doc);
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return (struct ast_xml_doc *) doc;
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}
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