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authorWaqas Hussain <waqas20@gmail.com>2009-06-25 17:22:53 +0500
committerWaqas Hussain <waqas20@gmail.com>2009-06-25 17:22:53 +0500
commit1ce4a34f68ef4ce967533a35299e205f2321f12b (patch)
tree0cefaba782788c79551ed00c015029c9e36603f3
parent3a8c1a3f6c3258a13f4791cd3d57145225ebb64f (diff)
downloadprosody-1ce4a34f68ef4ce967533a35299e205f2321f12b.tar.gz
prosody-1ce4a34f68ef4ce967533a35299e205f2321f12b.zip
util.stanza: Rewrote stanza_mt.__tostring. 20-30% faster stanza serialization. - #optimization
-rw-r--r--util/stanza.lua50
1 files changed, 18 insertions, 32 deletions
diff --git a/util/stanza.lua b/util/stanza.lua
index 4f387561..aff0bfc7 100644
--- a/util/stanza.lua
+++ b/util/stanza.lua
@@ -23,6 +23,7 @@ local next = next;
local print = print;
local unpack = unpack;
local s_gsub = string.gsub;
+local s_char = string.char;
local os = os;
local do_pretty_printing = not os.getenv("WINDIR");
@@ -116,54 +117,39 @@ function stanza_mt:childtags()
end
-do
- local xml_entities = { ["'"] = "&apos;", ["\""] = "&quot;", ["<"] = "&lt;", [">"] = "&gt;", ["&"] = "&amp;" };
- function xml_escape(s) return s_gsub(s, "['&<>\"]", xml_entities); end
-end
-
-local xml_escape = xml_escape;
-
-local function dostring(t, buf, self, xml_escape)
+local xml_escape = (function()
+ local escape_table = { ["'"] = "&apos;", ["\""] = "&quot;", ["<"] = "&lt;", [">"] = "&gt;", ["&"] = "&amp;" };
+ return function(str) return (s_gsub(str, "['&<>\"]", escape_table)); end
+end)();
+local function _dostring(t, buf, self, xml_escape)
local nsid, ns, attrk = 0;
- t_insert(buf, "<");
- t_insert(buf, t.name);
- for k, v in pairs(t.attr) do if type(k) == "string" then
- t_insert(buf, " ");
+ t_insert(buf, "<"..t.name);
+ for k, v in pairs(t.attr) do
ns, attrk = s_match(k, "^([^|]+)|(.+)$");
if ns then
- nsid = (nsid or -1) + 1;
- t_insert(buf, "xmlns:ns"..nsid);
- t_insert(buf, "='");
- t_insert(buf, (xml_escape(tostring(ns))));
- t_insert(buf, "' ");
- t_insert(buf, "ns"..nsid..":"..attrk);
+ nsid = nsid + 1;
+ t_insert(buf, " xmlns:ns"..nsid.."='"..xml_escape(ns).."' ".."ns"..nsid..":"..attrk.."='"..xml_escape(v).."'");
else
- t_insert(buf, k);
+ t_insert(buf, " "..k.."='"..xml_escape(v).."'");
end
- t_insert(buf, "='");
- t_insert(buf, (xml_escape(tostring(v))));
- t_insert(buf, "'");
- end end
+ end
t_insert(buf, ">");
- for n, child in ipairs(t) do
- if child.name then
+ for n=1,#t do
+ local child = t[n];
+ if child.name then
self(child, buf, self, xml_escape);
else
- t_insert(buf, (xml_escape(child)));
+ t_insert(buf, xml_escape(child));
end
end
- t_insert(buf, "</");
- t_insert(buf, t.name);
- t_insert(buf, ">");
+ t_insert(buf, "</"..t.name..">");
end
-
function stanza_mt.__tostring(t)
local buf = {};
- dostring(t, buf, dostring, xml_escape);
+ _dostring(t, buf, _dostring, xml_escape);
return t_concat(buf);
end
-
function stanza_mt.top_tag(t)
local attr_string = "";
if t.attr then