--prof in node v4.x?

Question

I'm unable to get any profiling output from node 4.1.1:

[/tmp]% cat index.js                                                 (arkadiy@helium:/tmp)
console.log("boom");
[/tmp]% node --prof index.js                                         (arkadiy@helium:/tmp)
boom
[/tmp]% ls v8.log                                                    (arkadiy@helium:/tmp)
ls: v8.log: No such file or directory
[/tmp]% node --version                                               (arkadiy@helium:/tmp)
v4.1.1
[/tmp]% which node                                                   (arkadiy@helium:/tmp)
/usr/local/bin/node

--prof still appears to be a valid option and the manpage and all docs I can find seem to imply that the above invocation should generate a v8.log file I can analyze with eg node-tick . What am I doing wrong?

Answer 1

Looks like I can get a log with --perf_basic_prof

[/tmp]% node  --perf_basic_prof index.js                             (arkadiy@helium:/tmp)
boom
[/tmp]% ls *v8.log                                                   (arkadiy@helium:/tmp)
isolate-0x101804c00-v8.log