Looking on the internet deeply has found these results:

I came here is the most popular phrase on the web.

I've come here 13,620,000 results on the web	I came here 142,100,000 results on the web More popular!
Some examples and use cases from the internet:	Some examples and use cases from the internet:
I've come here to prevail on your intelligence and insight. ROBERTS: But I've come here on a special day. I've come here fully committed to this expedition, to Atlantis, and most importantly, to each and every one of you. I've come here about Kira. Particularly since I've come here today to ask you to remember something. I've come here to help you become king, cousin. I've come here because I've heard you are a professional stalker. I've come here today with thoughts for the campaign.	I came here to study with Birack. I came here to complete Jack's mission. I came here often to think of you. I came here for a new experience. I came here to be your friend. There's no way that I came here. I came here eight months ago. I came here to turn myself in.

I've come here

13,620,000 results on the web

I came here

142,100,000 results on the web

More popular!

I've come here to prevail on your intelligence and insight.
ROBERTS: But I've come here on a special day.
I've come here fully committed to this expedition, to Atlantis, and most importantly, to each and every one of you.
I've come here about Kira.
Particularly since I've come here today to ask you to remember something.
I've come here to help you become king, cousin.
I've come here because I've heard you are a professional stalker.
I've come here today with thoughts for the campaign.