Github user zero323 commented on the pull request:
https://github.com/apache/spark/pull/9099#issuecomment-147799470
@shivaram
Spark 1.5.1
```
df <- read.csv("flights.csv")
microbenchmark::microbenchmark(createDataFrame(sqlContext, df), times=3)
## Unit: seconds
## expr min lq mean median
uq
## createDataFrame(sqlContext, df) 96.41565 97.19515 99.08441 97.97465
100.4188
## max neval
## 102.8629 3
```
After patch on 1.6:
```
df <- read.csv("flights.csv")
microbenchmark::microbenchmark(createDataFrame(sqlContext, df), times=5)
## expr min lq mean median
uq
## createDataFrame(sqlContext, df) 5.366246 5.862174 6.353852 6.033105
6.156628
## max neval
## 8.351105 5
```
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