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https://issues.apache.org/jira/browse/TAP5-1775?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]
Pedro Ayala updated TAP5-1775:
------------------------------
Attachment: changes.patch
> Improve javascript performance while creating zone events
> ---------------------------------------------------------
>
> Key: TAP5-1775
> URL: https://issues.apache.org/jira/browse/TAP5-1775
> Project: Tapestry 5
> Issue Type: Improvement
> Components: tapestry-core
> Affects Versions: 5.3
> Reporter: Pedro Ayala
> Labels: javascript, performance
> Attachments: changes.patch
>
>
> While creating eventLinks and actionLinks it is necessary to call
> updateZoneOnEvent to create the observe and store the zoneId in the element
> for future references.
> The method is also checking if the zoneId exist before storing it in the
> element store information. While this feature is quite useful in debug mode,
> it is also consuming some time in production mode.
> With this patch we will prevent the check while running in production mode,
> this improve performance in older browser like internet explorer 7.
> Index: src/main/resources/org/apache/tapestry5/tapestry.js
> ===================================================================
> --- src/main/resources/org/apache/tapestry5/tapestry.js
> +++ src/main/resources/org/apache/tapestry5/tapestry.js
> @@ -1020,21 +1020,32 @@ T5.extendInitializers({
> updateZoneOnEvent : function(eventName, element, zoneId, url) {
> element = $(element);
>
> - $T(element).zoneUpdater = true;
> -
> - var zoneElement = zoneId == '^' ? $(element).up('.t-zone')
> - : $(zoneId);
> -
> - if (!zoneElement) {
> - Tapestry
> - .error(
> - "Could not find zone element '#{zoneId}' to update on
> #{eventName} of element '#{elementId}'.",
> - {
> - zoneId : zoneId,
> - eventName : eventName,
> - elementId : element.id
> - });
> - return;
> + var Telement = $T(element);
> + Telement.zoneUpdater = true;
> +
> + var destZoneId = zoneId;
> + var zoneElement = null;
> + if (zoneId == '^') {
> + zoneElement = element.up('.t-zone');
> + if (zoneElement)
> + destZoneId = zoneElement.id;
> + }
> +
> + if (Tapestry.DEBUG_ENABLED) {
> + if (!zoneElement && zoneId != '^')
> + zoneElement = $(zoneId);
> +
> + if (!zoneElement) {
> + Tapestry
> + .error(
> + "Could not find zone element '#{zoneId}' to update on
> #{eventName} of element '#{elementId}'.",
> + {
> + zoneId : zoneId,
> + eventName : eventName,
> + elementId : element.id
> + });
> + return;
> + }
> }
>
> /*
> @@ -1042,7 +1053,7 @@ T5.extendInitializers({
> * changed dynamically on the client side.
> */
>
> - $T(element).zoneId = zoneElement.id;
> + Telement.zoneId = zoneId;
>
> if (element.tagName == "FORM") {
>
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