Used `elasticsearch-api` gem to get it working `https://github.com/elastic/elasticsearch-ruby/tree/master/elasticsearch-api`
response = client.search index: 'index_name', body: { "_source": false, "query": { "nested": { "path": "events", "query": { "bool": { "must":[ {"match": {"events.team_id": "xyz"}}, {"match": {"_id": "sdlfjslasdfj"}} ] } }, "inner_hits": { "size": 10, "from": 0, "sort": [{ "events.starts_at": "asc" }] } } } }

Just out of curiosity I've taken a look at what happens under the hood, and I've used [dtruss/strace][1] on each test.
C++
./a.out < in Saw 6512403 lines in 8 seconds. Crunch speed: 814050
syscalls `sudo dtruss -c ./a.out < in`
CALL COUNT __mac_syscall 1 <snip> open 6 pread 8 mprotect 17 mmap 22 stat64 30 read_nocancel 25958

Python
./a.py < in Read 6512402 lines in 1 seconds. LPS: 6512402
syscalls `sudo dtruss -c ./a.py < in`
CALL COUNT __mac_syscall 1 <snip> open 5 pread 8 mprotect 17 mmap 21 stat64 29
[1]: http://en.wikipedia.org/wiki/Strace