106 lines
2.1 KiB
Plaintext
106 lines
2.1 KiB
Plaintext
<%@include file="includes/setup.md.rsp"%>
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<%@string fcnname="allocVector"%>
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<% fcnname <- "<%@string name="fcnname"%>" %>
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<%@meta title="${fcnname}() benchmarks"%>
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<%@meta author="Henrik Bengtsson"%>
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<%@meta date="2014-11-09"%>
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<%@include file="${header}"%>
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# <%@meta name="title"%>
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This report benchmark the performance of <%=fcnname%>() against alternative methods.
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## Alternative methods
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* vector() + assignment
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* rep()
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* matrix() + as.vector()
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where
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```r
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<%=withCapture({
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allocVector_R1 <- function(length, value = NA) {
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x <- vector(mode = typeof(value), length = length)
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if (!is.finite(value) || value != 0) x[] <- value
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x
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} # allocVector_R1()
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allocVector_R2 <- function(length, value = NA) {
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x <- matrix(data = value, nrow = length, ncol = 1L)
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as.vector(x)
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} # allocVector_R2()
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})%>
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```
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<% for (mode in c("integer", "double")) { %>
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## Data type "<%=mode%>"
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### Data
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```r
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<%=withCapture({
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<%@include file="R/random-vectors.R"%>
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data <- rvectors(mode = mode)
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values <- list(zero = 0, one = 1, "NA" = NA_real_)
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if (mode != "double")
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values <- lapply(values, FUN = function(x) { storage.mode(x) <- mode; x })
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})%>
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```
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### Results
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<% for (ii in seq_along(data)) { %>
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<%
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dataLabel <- names(data)[ii]
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x <- data[[dataLabel]]
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gc()
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%>
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### <%=dataLabel%> matrix
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<% for (value in values) { %>
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<%
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valueLabel <- as.character(value)
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mprintf("%s: %s, value=%s\n", mode, dataLabel, valueLabel)
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%>
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```r
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<%=withCapture({
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n <- length(data[[.dataLabel.]])
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str(value)
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})%>
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```
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<% gc() %>
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```r
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<%=withCapture({
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stats <- microbenchmark(
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"allocVector" = allocVector(length = n, value = value),
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"rep" = rep(value, times = n),
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"allocVector_R1" = allocVector_R1(length = n, value = value),
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"allocVector_R2" = allocVector_R2(length = n, value = value),
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unit = "ms"
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)
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})%>
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```
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<% benchmarkResults(stats, tags=c(mode, dataLabel, valueLabel)) %>
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<% } # for (value in values) %>
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<% } # for (ii ...) %>
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<% } # for (mode ...) %>
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<%@include file="${footer}"%>
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<%---------------------------------------------------------------------------
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HISTORY:
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2014-11-01
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o Created.
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---------------------------------------------------------------------------%>
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