1. I applaud you for that performance.
Not natural. A better sentence would depend on the context. Is the 'applause' actual or metaphoric? If actual, then the applause itself makes the statement. If metaphoric, then performance is the wrong word.
2. When I came back to my senses, I was like, “what happened?” (used this in a conversation)
3. When it came time to do this in March, I was glad that I started preparing for it early. In March, when it came time to do that, I was glad that I had started preparing early. Probably the words in March could be left out- it depends on context.
Student or Learner