Currently I'm using Include children macros. (This macros indicates all children of another page on current page)
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For example as you can see there is other articles page and it has children:

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I showed children page of Other articles on another page

But there is latency problem when I want open page it opens very late.
What can I do for resolve this problem?
User macros code:
## Macro Name: include_children
## Visibility:
## Macro Title: Include Children
## Description: This will include the content from from the child pages onto the parent page that this macro is placed on.
## Categories: Confluence content
## Icon URL:
## Documentation URL: https://bitbucket.org/fredclown/confluence-user-macros
## Macro Body Processing: No macro body
##############################
## Template: ##
##############################
## Developed By: Davin Studer
## Date Created: 12/4/2014
## Updated by: Milo Grika
## Added: show/hide title, link/unlink title.
## Updated by: Gregor Mirai
## Date updated: 26/1/2016
## Added: page separator, PDF split page marker options.
## Updated by: Davin Studer
## Date updated: 4/13/2018
## Added: Include Descendants checkbox
## Updated by: Davin Studer
## Date updated: 12/3/2018
## Added: Added an option to specify the parent page.
## @param ShowTitle:title=Show Title|type=boolean|desc=Deselect to remove the title of the child page.|default=true
## @param LinkTitle:title=Link Title|type=boolean|desc=Select to turn the titles of the child pages into links to those pages (Show Title must be selected).|default=false
## @param IncludeDescendants:title=Include Descendants|type=boolean|desc=Select to include descendants.|default=false
## @param PageSeparator:title=Page Separator|type=boolean|desc=Separate pages with horizontal ruler.|default=false
## @param SplitPages:title=Split Pages|type=boolean|desc=Split pages marker for PDF export will be inserted.|default=false
## @param Collapsible:title=Collapsible|type=boolean|desc=Should the included pages be collapsible?|default=false
## @param FilterLabel:title=Filter on Page Label|type=string|desc=Include only subpages with the specified label.
## @param Page:title=Page title|type=confluence-content|required=false|desc=If not specified, the current page is used.
## @param Order:title=Order|type=enum|enumValues=Nav Order,Reverse Nav Order,Alphabetical,Reverse Alphabetical,Create Date,Reverse Create Date|default=nav order|desc=In what order should the child pages be displayed? Nav Order refers to the order of the child pages in the page tree. Reverse Nav Order simply reverses that.
#set( $containerManagerClass=$content.class.forName('com.atlassian.spring.container.ContainerManager') )
#set( $getInstanceMethod=$containerManagerClass.getDeclaredMethod('getInstance',null) )
#set( $containerManager=$getInstanceMethod.invoke(null,null) )
#set( $containerContext=$containerManager.containerContext )
#set( $pageManager=$containerContext.getComponent('pageManager') )
#if( $paramPage && $paramPage != "" )
##########################
## Find the page ##
##########################
#set( $parts = $paramPage.split(":") )
#set( $i = 0 )
#set ( $len = 0 )
#set( $key = "" )
#set( $name = "" )
##Having trouble finding out the length/size of $parts ... brute force it
#foreach ( $part in $parts )
#set ( $len = $len + 1 )
#end
#if ( $len == 1 )
#set ( $key = $content.spaceKey )
#set ( $name = $paramPage )
#else
#foreach ( $part in $parts )
#if ( $i == 0 )
#set ( $key = $part )
#set ( $i = $i + 1 )
#else
#set ( $name = $part )
#end
#end
#end
#set ( $tempcontent = "" )
#if ( $pageManager )
#set ( $tempcontent = $pageManager.getPage($key, $name) )
#end
#if ( $tempcontent && $tempcontent != "" )
#set ( $content = $tempcontent )
#else
The page "$paramPage" was not found in this space.
#set ( $content = "" )
#end
#end
#set( $data = "" )
#childPages ( $content.id )
#macro ( childPages $pageid )
## Find the array of (sorted) child pages.
#if( $paramOrder == "Nav Order" || $paramOrder == "Reverse Nav Order" )
#set( $children = $pageManager.getPage($pageid).getSortedChildren() )
#elseif( $paramOrder == "Alphabetical" || $paramOrder == "Reverse Alphabetical" )
#set( $array = $pageManager.getPage($pageid).getChildren() )
###############################################################
## Could not find a method to get them in Alphabetical order ##
## Must sort them myself ... Bubble sort ##
###############################################################
#set( $size = $array.size() )
#foreach( $junk in $array )
#set( $count = -1 )
#foreach( $line in $array )
#set( $count = $count + 1 )
#if( $velocityCount < $size )
#if( $line.getTitle().compareToIgnoreCase($array.get($velocityCount).getTitle()) > 0 )
#set( $tmp = $array.get($velocityCount) )
#set( $junk = $array.set($velocityCount, $line) )
#set( $junk = $array.set($count, $tmp) )
#end
#end
#end
#end
#set( $children = $array )
#elseif( $paramOrder == "Create Date" || $paramOrder == "Reverse Create Date" )
#set( $children = $pageManager.getPage($pageid).getChildren() )
#end
## Prepare children data.
#foreach( $child in $children )
## Create the map of labels for the page.
#set( $labelsMap = {} )
#foreach( $label in $child.getLabels() )
#set( $dummy = $labelsMap.put($label.toString(), 1) )
#end
## Include all pages (when no filter label is specified) or pages with a specific label.
#if( !$paramFilterLabel || $paramFilterLabel && $labelsMap.containsKey($paramFilterLabel) )
#set( $include = "" )
#if ( $paramCollapsible == true )
#set( $include = $include + '<ac:structured-macro ac:name="expand">' )
#set( $include = $include + '<ac:parameter ac:name="title">' + $child.getTitle() + '</ac:parameter>' )
#set( $include = $include + '<ac:rich-text-body>' )
#set( $include = $include + '<p>' )
#end
#set( $include = $include + '<div class="included-child-page">' )
## Show title and links.
#if( $paramShowTitle == true )
#if( $paramLinkTitle == true )
#set( $include = $include + '<h1 class="included-child-page-title"><a href="' + $child.getUrlPath() + '">' + $child.getTitle() + '</a></h1>' )
#else
#set( $include = $include + '<h1 class="included-child-page-title">' + $child.getTitle() + '</h1>' )
#end
#end
## Include sub page.
#set( $include = $include + '<div class="included-child-page-body">' )
#set( $include = $include + '<ac:structured-macro ac:name="include">' )
#set( $include = $include + '<ac:parameter ac:name="">' )
#set( $include = $include + '<ac:link>' )
#set( $include = $include + '<ri:page ri:content-title="' + $child.getTitle() + '" ri:space-key="' + $content.spaceKey + '"/>' )
#set( $include = $include + '</ac:link>' )
#set( $include = $include + '</ac:parameter>' )
#set( $include = $include + '</ac:structured-macro>' )
#set( $include = $include + '</div>' )
#set( $include = $include + '</div>' )
#if ( $paramCollapsible == true )
#set( $include = $include + '</p>' )
#set( $include = $include + '</ac:rich-text-body>' )
#set( $include = $include + '</ac:structured-macro>' )
#end
## Define sorting order.
#set( $inOrder = false )
#if( $paramOrder == "Nav Order" || $paramOrder == "Alphabetical" || $paramOrder == "Create Date" )
#set( $inOrder = true )
#end
## Include page separator or include page split marker used for PDF exports.
#if( $paramPageSeparator == true )
#set( $include = $include + '<hr/><br/>' )
#end
#if( $paramSplitPages == true )
#set( $include = $include + '<div style="page-break-before:always;"></div>' )
#end
## Add page content in order or in reverse order.
#if( $inOrder == true )
#set( $data = $data + $include )
#else
#set( $data = $include + $data)
#end
#end
#if($paramIncludeDescendants == true)
#childPages( $child.id )
#end
#end
#end
$data
<style type="text/css">
.included-child-page {
margin-bottom: 30px;
overflow: hidden;
}
</style>