Condition in 75 times loop takes 17 sec in local - php

Question

In a list of user, I have an avatar. When I write this:
<img src="{{ $user->avatar }}" class="img-circle img-sm"/></a>
Scripts take 17 sec for 75 users.
But when I write:
<img src="{{ "/images/avatar/avatar.png" }}" class="img-circle img-sm"/></a>
it goes pretty quick.
Why is this attribute so time consuming???
In this page, I call a lot of attribute from this object, but only this one is time consuming... It's just string more....
I'm in Laravel 5.3
EDIT: Paste full table:
<table class="table datatable-responsive" id="table{{ $championship->id }}">
<thead>
<tr>
<th class="min-tablet text-center "
data-hide="phone">{{ trans('core.avatar') }}</th>
<th class="all">{{ trans('core.username') }}</th>
<th class="phone">{{ trans('core.email') }}</th>
<th align="center" class="phone">{{ trans_choice('categories.category',1) }}</th>
<th align="center" class="phone">{{ trans('core.paid') }}</th>
<th class="phone">{{ trans('core.country') }}</th>
#can('edit',$tournament)
<th class="all">{{ trans('core.action') }}</th>
#endcan
</tr>
</thead>
#foreach($championship->users as $user)
<?php
$arr_country = $countries->where('id', $user->country_id)->all();
$country = array_first($arr_country, null);
?>
<tr>
<td class="text-center">
{{--<a href="{!! URL::action('UserController#show', $user->slug) !!}"><img--}}
{{--src="{{ is_null($user->avatar) ? "/images/avatar/avatar.png" : $user->avatar }}" class="img-circle img-sm"/></a>--}}
</td>
<td>
#can('edit',$user)
{{ $user->name }}
#else
{{ $user->name }}
#endcan
</td>
<td>{{ $user->email }}</td>
<td class="text-center">{{ $championship->category->buildName($grades)}}</td>
<td class="text-center">
#if ($user->pivot->confirmed)
<?php $class = "glyphicon glyphicon-ok-sign text-success";?>
#else
<?php $class = "glyphicon glyphicon-remove-sign text-danger ";?>
#endif
#can('edit',$tournament)
{!! Form::open(['method' => 'PUT', 'id' => 'formConfirmTCU',
'action' => ['CompetitorController#confirmUser', $tournament->slug, $championship->id,$user->slug ]]) !!}
<button type="submit"
class="btn btn-flat btnConfirmTCU"
id="confirm_{!! $tournament->slug !!}_{!! $championship->id !!}_{!! $user->slug !!}"
data-tournament="{!! $tournament->slug !!}"
data-category="{!! $championship->id !!}"
data-user="{!! $user->slug !!}">
<i class="{!! $class !!} "></i>
</button>
{!! Form::close() !!}
#else
<i class="{!! $class !!} "></i>
#endcan
</td>
<td class="text-center"><img src="/images/flags/{{ $country->flag }}"
alt="{{ $country->name }}"/></td>
#can('edit',$tournament)
<td class="text-center">
{!! Form::model(null, ['method' => 'DELETE', 'id' => 'formDeleteTCU',
'action' => ['CompetitorController#deleteUser', $tournament->slug, $championship->id,$user->slug ]]) !!}
<button type="submit"
class="btn text-warning-600 btn-flat btnDeleteTCU"
id="delete_{!! $tournament->slug !!}_{!! $championship->id !!}_{!! $user->slug !!}"
data-tournament="{!! $tournament->slug !!}"
data-category="{!! $championship->id !!}"
data-user="{!! $user->slug !!}">
<i class="glyphicon glyphicon-remove"></i>
</button>
{!! Form::close() !!}
</td>
#endcan
</tr>
#endforeach
</table>

Answer 1

Is the avatar property a relationship to another table? It could be a lazy loading problem inside the foreach.
You can find more info about lazy and eager loading at Eloquent documentation.