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

<%@string colname="colCumsums"%>
<%@string rowname="rowCumsums"%>
<%@string fcnname="colRowCumsums_subset"%>
<%@meta title="${colname}() and ${rowname}() benchmarks on subsetted computation"%>
<%@meta author="Dongcan Jiang"%>
<%@meta date="2015-06-06"%>

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


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

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


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

## Data type "<%=mode%>"

### Data
```r
<%=withCapture({
<%@include file="R/random-matrices.R"%>
data <- rmatrices(mode = mode)
})%>
```

### Results

<% for (dataLabel in names(data)) { %>
<% mprintf("%s: %s\n", mode, dataLabel)  %>
#### <%=dataLabel%> <%=mode%> matrix

```r
<%=withCapture({
X <- data[[.dataLabel.]]
rows <- sample.int(nrow(X), size = nrow(X)*0.7)
cols <- sample.int(ncol(X), size = ncol(X)*0.7)
X_S <- X[rows, cols]
gc()

colStats <- microbenchmark(
 "colCumsums_X_S"           = colCumsums(X_S),
 "colCumsums(X, rows, cols)"  = colCumsums(X, rows = rows, cols = cols),
 "colCummins(X[rows, cols])" = colCumsums(X[rows, cols]),
 unit = "ms"
)

X <- t(X)
X_S <- t(X_S)
gc()

rowStats <- microbenchmark(
 "rowCumsums_X_S"           = rowCumsums(X_S),
 "rowCumsums(X, cols, rows)"  = rowCumsums(X, rows = cols, cols = rows),
 "rowCumsums(X[cols, rows])" = rowCumsums(X[cols, rows]),
 unit = "ms"
)
})%>
```

<% crBenchmarkResults(colStats, rowStats, tags=c(mode, dataLabel)) %>

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

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


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


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