Localize pipe slow performance

[vlados]

When I am using localize in a long list is getting very bad performance:

<a [roterLink]="['user',user.id] | localize" ngFor="let user of users; trackBy: trackFn">{{ user.name }}</a>

When I replace it with this is much better

<a [roterLink]="['/' + currentLang + '/user',user.id]" ngFor="let user of users; trackBy: trackFn">{{ user.name }}</a>

How I can use LocalizePipe without affecting the performance?

[luxalpa]

LocalizePipe is an impure pipe, meaning whenever your component updates, the pipe will update (likely multiple times). Its performance will be much worse in development mode than in production. A solution could be to make sure the change detector doesn't run over your component too frequently.