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master: 96%

Ran 18 Jan 2018 03:28AM UTC

Files 15

Run time 0s

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Committed 18 Jan 2018 03:04AM UTC coverage: 97.959%. Remained the same

Job # 54.1

Build Type

push

travis-ci

Committed by

twang2218

Commit Message

Improve slicing performance

* Replace `head()/tail()` with `data.table`'s indexing. It can improve performance by 30%~60%.

Before (`head()/tail()`):

---
Unit: milliseconds
                       expr        min         lq       mean     median         uq        max neval
  create_pmap(copy(el_10k))   331.3813   430.4172  1004.1038   486.5171   518.0146  5945.3911    10
 create_pmap(copy(el_100k))   417.2192   452.8110   544.5129   591.1354   607.8555   641.2991    10
   create_pmap(copy(el_1m))  2057.1037  2202.2641  4609.8769  2631.9217  7847.6545  8466.5252    10
  create_pmap(copy(el_10m)) 23082.6826 28037.9299 31128.4557 29865.4468 33355.8728 42216.4454    10
---

After (`data.table[]`):

---
Unit: milliseconds
                       expr        min         lq       mean     median         uq        max neval
  create_pmap(copy(el_10k))   339.9077   377.3973   642.3140   456.4188   971.7753  1240.7110    10
 create_pmap(copy(el_100k))   411.8673   414.4656   535.7509   451.7886   633.8586   956.8731    10
   create_pmap(copy(el_1m))  1181.9168  1206.9495  1629.7927  1542.5033  1881.3097  2672.0710    10
  create_pmap(copy(el_10m)) 16923.7892 16957.7548 19407.6900 18383.3316 19774.4897 29064.6801    10
---

Signed-off-by: Tao Wang <twang2218@gmail.com>

Run Details

336 of 343 relevant lines covered (97.96%)

17.71 hits per line

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