topic GetImageUrl called twice in ArcGIS JavaScript Maps SDK Questions

topic GetImageUrl called twice in ArcGIS JavaScript Maps SDK Questions https://community.esri.com/t5/arcgis-javascript-maps-sdk-questions/getimageurl-called-twice/m-p/226954#M21196 <HTML><HEAD></HEAD><BODY><SPAN>PROBLEM: </SPAN><BR /><SPAN>GetImageUrl called twice resulting in two trips to the server if caching is off.</SPAN><BR /><BR /><SPAN>QUESTION: </SPAN><BR /><SPAN>How can this be prevented?</SPAN><BR /><BR /><SPAN>HOW TO REPRODUCE:</SPAN><BR /><SPAN>Go to any sample with a dynamic layer (e.g. </SPAN><A href="http://help.arcgis.com/en/webapi/javascript/arcgis/demos/layout/layout_mapcontainersplitinthree.html">http://help.arcgis.com/en/webapi/javascript/arcgis/demos/layout/layout_mapcontainersplitinthree.html</A><SPAN>)</SPAN><BR /><SPAN>Run a tool like fiddler2 to monitor IP traffic</SPAN><BR /><SPAN>Resize the browser</SPAN><BR /><SPAN>Notice that two identical requests are sent</SPAN><BR /><BR /><A href="http://server.arcgisonline.com/ArcGIS/rest/services/Demographics/USA_Daytime_Population/MapServer/export?dpi=96&transparent=true&format=png8&bbox=-13200407.251811692%2C4041517.6332653123%2C-13189476.756766926%2C4051186.917343374&bboxSR=102100&imageSR=102100&size=572%2C506&f=image">http://server.arcgisonline.com/ArcGIS/rest/services/Demographics/USA_Daytime_Population/MapServer/export?dpi=96&transparent=true&format=png8&bbox=-13200407.251811692%2C4041517.6332653123%2C-13189476.756766926%2C4051186.917343374&bboxSR=102100&imageSR=102100&size=572%2C506&f=image</A><BR /><BR /><A href="http://server.arcgisonline.com/ArcGIS/rest/services/Demographics/USA_Daytime_Population/MapServer/export?dpi=96&transparent=true&format=png8&bbox=-13200407.251811692%2C4041517.6332653123%2C-13189476.756766928%2C4051186.917343374&bboxSR=102100&imageSR=102100&size=572%2C506&f=image">http://server.arcgisonline.com/ArcGIS/rest/services/Demographics/USA_Daytime_Population/MapServer/export?dpi=96&transparent=true&format=png8&bbox=-13200407.251811692%2C4041517.6332653123%2C-13189476.756766928%2C4051186.917343374&bboxSR=102100&imageSR=102100&size=572%2C506&f=image</A><BR /><BR /><SPAN>A single call to map._resize results in getImageUrl being called twice (once for the resize and once for the change of extent).</SPAN></BODY></HTML> Fri, 27 Jan 2012 00:46:58 GMT CoreyAlix 2012-01-27T00:46:58Z GetImageUrl called twice https://community.esri.com/t5/arcgis-javascript-maps-sdk-questions/getimageurl-called-twice/m-p/226954#M21196 <HTML><HEAD></HEAD><BODY><SPAN>PROBLEM: </SPAN><BR /><SPAN>GetImageUrl called twice resulting in two trips to the server if caching is off.</SPAN><BR /><BR /><SPAN>QUESTION: </SPAN><BR /><SPAN>How can this be prevented?</SPAN><BR /><BR /><SPAN>HOW TO REPRODUCE:</SPAN><BR /><SPAN>Go to any sample with a dynamic layer (e.g. </SPAN><A href="http://help.arcgis.com/en/webapi/javascript/arcgis/demos/layout/layout_mapcontainersplitinthree.html">http://help.arcgis.com/en/webapi/javascript/arcgis/demos/layout/layout_mapcontainersplitinthree.html</A><SPAN>)</SPAN><BR /><SPAN>Run a tool like fiddler2 to monitor IP traffic</SPAN><BR /><SPAN>Resize the browser</SPAN><BR /><SPAN>Notice that two identical requests are sent</SPAN><BR /><BR /><A href="http://server.arcgisonline.com/ArcGIS/rest/services/Demographics/USA_Daytime_Population/MapServer/export?dpi=96&transparent=true&format=png8&bbox=-13200407.251811692%2C4041517.6332653123%2C-13189476.756766926%2C4051186.917343374&bboxSR=102100&imageSR=102100&size=572%2C506&f=image">http://server.arcgisonline.com/ArcGIS/rest/services/Demographics/USA_Daytime_Population/MapServer/export?dpi=96&transparent=true&format=png8&bbox=-13200407.251811692%2C4041517.6332653123%2C-13189476.756766926%2C4051186.917343374&bboxSR=102100&imageSR=102100&size=572%2C506&f=image</A><BR /><BR /><A href="http://server.arcgisonline.com/ArcGIS/rest/services/Demographics/USA_Daytime_Population/MapServer/export?dpi=96&transparent=true&format=png8&bbox=-13200407.251811692%2C4041517.6332653123%2C-13189476.756766928%2C4051186.917343374&bboxSR=102100&imageSR=102100&size=572%2C506&f=image">http://server.arcgisonline.com/ArcGIS/rest/services/Demographics/USA_Daytime_Population/MapServer/export?dpi=96&transparent=true&format=png8&bbox=-13200407.251811692%2C4041517.6332653123%2C-13189476.756766928%2C4051186.917343374&bboxSR=102100&imageSR=102100&size=572%2C506&f=image</A><BR /><BR /><SPAN>A single call to map._resize results in getImageUrl being called twice (once for the resize and once for the change of extent).</SPAN></BODY></HTML> Fri, 27 Jan 2012 00:46:58 GMT https://community.esri.com/t5/arcgis-javascript-maps-sdk-questions/getimageurl-called-twice/m-p/226954#M21196 CoreyAlix 2012-01-27T00:46:58Z