<%@include file="includes/setup.md.rsp"%>

<%@string fcnname="varDiff_subset"%>
<%@string subname="varDiff"%>
<%@meta title="${subname}() benchmarks on subsetted computation"%>
<%@meta author="Dongcan Jiang"%>
<%@meta date="2015-06-07"%>

<%@include file="${header}"%>


# <%@meta name="title"%>

This report benchmark the performance of <%=subname%>() on subsetted computation.

<% for (mode in c("integer", "double")) { %>

## Data type "<%=mode%>"
### Data
```r
<%=withCapture({
<%@include file="R/random-vectors.R"%>
data <- rvectors(mode = mode)
data <- data[1:4]
})%>
```

### Results

<% for (ii in seq_along(data)) { %>
<%
dataLabel <- names(data)[ii]
mprintf("%s: %s\n", mode, dataLabel)
%>
### <%=dataLabel%> vector

#### All elements
```r
<%=withCapture({
x <- data[[.dataLabel.]]
idxs <- sample.int(length(x), size = length(x)*0.7)
x_S <- x[idxs]
gc()

stats <- microbenchmark(
 "varDiff_x_S"      = varDiff(x_S),
 "varDiff(x, idxs)"  = varDiff(x, idxs = idxs),
 "varDiff(x[idxs])" = varDiff(x[idxs]),
  unit = "ms"
)
})%>
```

<% benchmarkResults(stats, tags=c(mode, dataLabel)) %>

<% } # for (ii ...) %>

<% } # for (mode ...) %>

<%@include file="${footer}"%>


<%---------------------------------------------------------------------------
HISTORY:
2015-06-07
o Created.
---------------------------------------------------------------------------%>
