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| author | Sean Bright <sean.bright@gmail.com> | 2017-12-01 09:29:43 -0500 |
|---|---|---|
| committer | Sean Bright <sean.bright@gmail.com> | 2017-12-01 08:40:56 -0600 |
| commit | 3af6c1b4bc9bf910fb27c01e5a28c2de0095fa22 (patch) | |
| tree | 22325b09fa23c9bd5162d8f0a6424ef19e1595e1 /main/xml.c | |
| parent | b4bbe04898c8a1aa577f1dbf279dde1677facb8b (diff) | |
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
Diffstat (limited to 'main/xml.c')
| -rw-r--r-- | main/xml.c | 3 |
1 files changed, 3 insertions, 0 deletions
diff --git a/main/xml.c b/main/xml.c index d32a8c5e4..d476c1d4f 100644 --- a/main/xml.c +++ b/main/xml.c @@ -96,6 +96,9 @@ struct ast_xml_doc *ast_xml_open(char *filename) ast_log(LOG_NOTICE, "XSLT support not found. XML documentation may be incomplete.\n"); #endif /* HAVE_LIBXSLT */ + /* Optimize for XPath */ + xmlXPathOrderDocElems(doc); + return (struct ast_xml_doc *) doc; } |