diff --git a/DESCRIPTION b/DESCRIPTION
index 30b4bec..a014ed5 100644
--- a/DESCRIPTION
+++ b/DESCRIPTION
@@ -1,6 +1,6 @@
 Package: proffer
 Title: Profile R Code and Visualize with 'Pprof'
-Version: 0.1.2.9000
+Version: 0.1.3
 Encoding: UTF-8
 Language: en-US
 License: MIT + file LICENSE
diff --git a/NEWS.md b/NEWS.md
index 851a41f..fe3c3a3 100644
--- a/NEWS.md
+++ b/NEWS.md
@@ -1,6 +1,6 @@
-# proffer 0.1.2.9000
-
+# proffer 0.1.3
 
+* Reduce check time of examples.
 
 # proffer 0.1.2
 
diff --git a/R/package.R b/R/package.R
index 61b7b25..2480c0f 100644
--- a/R/package.R
+++ b/R/package.R
@@ -23,7 +23,7 @@
 #' @importFrom utils browseURL Rprof
 #' @importFrom withr with_path
 #' @examples
-#' \dontrun{
+#' if (identical(Sys.getenv("PROFFER_EXAMPLES"), "true")) {
 #' # Start a pprof virtual server in the background.
 #' px <- pprof(replicate(1e2, sample.int(1e4)))
 #' # Terminate the server.
diff --git a/R/path.R b/R/path.R
index b159136..9638944 100644
--- a/R/path.R
+++ b/R/path.R
@@ -6,7 +6,7 @@
 #'   for setup instructions.
 #' @return Character, path to `pprof` it exists and `""` otherwise.
 #' @examples
-#' \dontrun{
+#' if (identical(Sys.getenv("PROFFER_EXAMPLES"), "true")) {
 #' pprof_path()
 #' }
 pprof_path <- function() {
diff --git a/R/pprof.R b/R/pprof.R
index 921c912..5cb14a6 100644
--- a/R/pprof.R
+++ b/R/pprof.R
@@ -7,7 +7,7 @@
 #'   for setup instructions.
 #' @inheritParams pprof
 #' @examples
-#' \dontrun{
+#' if (identical(Sys.getenv("PROFFER_EXAMPLES"), "true")) {
 #' test_pprof()
 #' }
 test_pprof <- function(
@@ -45,7 +45,7 @@ test_pprof <- function(
 #' @param ... Additional arguments passed on to [Rprof()]
 #'   via [record_pprof()].
 #' @examples
-#' \dontrun{
+#' if (identical(Sys.getenv("PROFFER_EXAMPLES"), "true")) {
 #' # Start a pprof virtual server in the background.
 #' px <- pprof(replicate(1e2, sample.int(1e4)))
 #' # Terminate the server.
@@ -82,7 +82,7 @@ pprof <- function(
 #' @param rprof Path to profiling samples generated
 #'   by `Rprof()` or [record_rprof()].
 #' @examples
-#' \dontrun{
+#' if (identical(Sys.getenv("PROFFER_EXAMPLES"), "true")) {
 #' rprof <- record_rprof(replicate(1e2, sample.int(1e4)))
 #' # Start a pprof virtual server in the background.
 #' px <- serve_rprof(rprof)
@@ -129,7 +129,7 @@ serve_rprof <- function(
 #' @param verbose Logical, whether to print console messages
 #'   such as the URL of the local `pprof` server.
 #' @examples
-#' \dontrun{
+#' if (identical(Sys.getenv("PROFFER_EXAMPLES"), "true")) {
 #' pprof <- record_pprof(replicate(1e2, sample.int(1e4)))
 #' # Start a pprof virtual server in the background.
 #' px <- serve_pprof(pprof)
@@ -162,6 +162,8 @@ serve_pprof <- function(
 #' @return Port number, positive integer of length 1.
 #' @param lower Integer of length 1, lower bound of the port number.
 #' @param upper Integer of length 1, upper bound of the port number.
+#' @examples
+#' random_port()
 random_port <- function(lower = 49152L, upper = 65355L) {
   sample(seq.int(from = lower, to = upper, by = 1L), size = 1L)
 }
diff --git a/R/record.R b/R/record.R
index e002dfa..1f4a463 100644
--- a/R/record.R
+++ b/R/record.R
@@ -10,8 +10,10 @@
 #' @param ... Additional arguments passed on to [Rprof()]
 #'   via [record_rprof()].
 #' @examples
+#' if (identical(Sys.getenv("PROFFER_EXAMPLES"), "true")) {
 #' # Returns a path to pprof samples.
 #' record_pprof(replicate(1e2, sample.int(1e4)))
+#' }
 record_pprof <- function(expr, pprof = tempfile(), ...) {
   rprof <- record_rprof(expr, ...)
   to_pprof(rprof, pprof = pprof)
@@ -27,8 +29,10 @@ record_pprof <- function(expr, pprof = tempfile(), ...) {
 #'   Also returned from the function.
 #' @param ... Additional arguments passed on to [Rprof()].
 #' @examples
+#' if (identical(Sys.getenv("PROFFER_EXAMPLES"), "true")) {
 #' # Returns a path to Rprof samples.
 #' record_rprof(replicate(1e2, sample.int(1e4)))
+#' }
 record_rprof <- function(expr, rprof = tempfile(), ...) {
   on.exit(Rprof(NULL))
   Rprof(filename = rprof, ...)
@@ -43,8 +47,10 @@ record_rprof <- function(expr, rprof = tempfile(), ...) {
 #' @param rprof Path to Rprof samples.
 #' @param pprof Path to pprof samples.
 #' @examples
+#' if (identical(Sys.getenv("PROFFER_EXAMPLES"), "true")) {
 #' rprof <- record_rprof(replicate(1e2, sample.int(1e4)))
 #' to_pprof(rprof)
+#' }
 to_pprof <- function(rprof, pprof = tempfile()) {
   samples <- profile::read_rprof(path = rprof)
   profile::write_pprof(x = samples, path = pprof)
@@ -58,8 +64,10 @@ to_pprof <- function(rprof, pprof = tempfile()) {
 #' @param pprof Path to pprof samples.
 #' @param rprof Path to Rprof samples.
 #' @examples
+#' if (identical(Sys.getenv("PROFFER_EXAMPLES"), "true")) {
 #' pprof <- record_pprof(replicate(1e2, sample.int(1e4)))
 #' to_rprof(pprof)
+#' }
 to_rprof <- function(pprof, rprof = tempfile()) {
   samples <- profile::read_pprof(path = pprof)
   profile::write_rprof(x = samples, path = rprof)
diff --git a/man/pprof.Rd b/man/pprof.Rd
index c5b9e36..064a531 100644
--- a/man/pprof.Rd
+++ b/man/pprof.Rd
@@ -46,7 +46,7 @@ in a local interactive pprof server.
 Results are collected with \code{\link[=record_pprof]{record_pprof()}}.
 }
 \examples{
-\dontrun{
+if (identical(Sys.getenv("PROFFER_EXAMPLES"), "true")) {
 # Start a pprof virtual server in the background.
 px <- pprof(replicate(1e2, sample.int(1e4)))
 # Terminate the server.
diff --git a/man/pprof_path.Rd b/man/pprof_path.Rd
index f6e64bf..79fe3bb 100644
--- a/man/pprof_path.Rd
+++ b/man/pprof_path.Rd
@@ -18,7 +18,7 @@ See \url{https://github.com/r-prof/proffer#installation}
 for setup instructions.
 }
 \examples{
-\dontrun{
+if (identical(Sys.getenv("PROFFER_EXAMPLES"), "true")) {
 pprof_path()
 }
 }
diff --git a/man/proffer-package.Rd b/man/proffer-package.Rd
index 051ed5e..f943ca4 100644
--- a/man/proffer-package.Rd
+++ b/man/proffer-package.Rd
@@ -18,7 +18,7 @@ For documentation, visit \url{https://r-prof.github.io/proffer/}.
 }
 \examples{
 # TBD
-\dontrun{
+if (identical(Sys.getenv("PROFFER_EXAMPLES"), "true")) {
 # Start a pprof virtual server in the background.
 px <- pprof(replicate(1e2, sample.int(1e4)))
 # Terminate the server.
diff --git a/man/random_port.Rd b/man/random_port.Rd
index abe4ccb..dda6150 100644
--- a/man/random_port.Rd
+++ b/man/random_port.Rd
@@ -18,3 +18,6 @@ Port number, positive integer of length 1.
 Choose a random TCP port that is unlikely to be occupied
 by another process.
 }
+\examples{
+random_port()
+}
diff --git a/man/record_pprof.Rd b/man/record_pprof.Rd
index 19c61e2..7c19eb7 100644
--- a/man/record_pprof.Rd
+++ b/man/record_pprof.Rd
@@ -24,6 +24,8 @@ Profiles are recorded with \code{\link[=record_rprof]{record_rprof()}}
 and then converted with \code{\link[=to_pprof]{to_pprof()}}.
 }
 \examples{
+if (identical(Sys.getenv("PROFFER_EXAMPLES"), "true")) {
 # Returns a path to pprof samples.
 record_pprof(replicate(1e2, sample.int(1e4)))
 }
+}
diff --git a/man/record_rprof.Rd b/man/record_rprof.Rd
index 7d3c2d8..e21a680 100644
--- a/man/record_rprof.Rd
+++ b/man/record_rprof.Rd
@@ -21,6 +21,8 @@ Path to a file with Rprof samples.
 Run R code and record Rprof samples.
 }
 \examples{
+if (identical(Sys.getenv("PROFFER_EXAMPLES"), "true")) {
 # Returns a path to Rprof samples.
 record_rprof(replicate(1e2, sample.int(1e4)))
 }
+}
diff --git a/man/serve_pprof.Rd b/man/serve_pprof.Rd
index 1a70771..eae83df 100644
--- a/man/serve_pprof.Rd
+++ b/man/serve_pprof.Rd
@@ -45,7 +45,7 @@ Navigate a browser to a URL in the message.
 The server starts in a background process
 }
 \examples{
-\dontrun{
+if (identical(Sys.getenv("PROFFER_EXAMPLES"), "true")) {
 pprof <- record_pprof(replicate(1e2, sample.int(1e4)))
 # Start a pprof virtual server in the background.
 px <- serve_pprof(pprof)
diff --git a/man/serve_rprof.Rd b/man/serve_rprof.Rd
index 84942f6..30a07e0 100644
--- a/man/serve_rprof.Rd
+++ b/man/serve_rprof.Rd
@@ -47,7 +47,7 @@ Navigate a browser to a URL in the message.
 The server starts in a background process
 }
 \examples{
-\dontrun{
+if (identical(Sys.getenv("PROFFER_EXAMPLES"), "true")) {
 rprof <- record_rprof(replicate(1e2, sample.int(1e4)))
 # Start a pprof virtual server in the background.
 px <- serve_rprof(rprof)
diff --git a/man/test_pprof.Rd b/man/test_pprof.Rd
index 18caa4a..d532970 100644
--- a/man/test_pprof.Rd
+++ b/man/test_pprof.Rd
@@ -38,7 +38,7 @@ See \url{https://github.com/r-prof/proffer#installation}
 for setup instructions.
 }
 \examples{
-\dontrun{
+if (identical(Sys.getenv("PROFFER_EXAMPLES"), "true")) {
 test_pprof()
 }
 }
diff --git a/man/to_pprof.Rd b/man/to_pprof.Rd
index 31cb64f..4108dfa 100644
--- a/man/to_pprof.Rd
+++ b/man/to_pprof.Rd
@@ -18,6 +18,8 @@ Path to pprof samples.
 Convert Rprof samples to pprof format.
 }
 \examples{
+if (identical(Sys.getenv("PROFFER_EXAMPLES"), "true")) {
 rprof <- record_rprof(replicate(1e2, sample.int(1e4)))
 to_pprof(rprof)
 }
+}
diff --git a/man/to_rprof.Rd b/man/to_rprof.Rd
index 76d04f2..93248bd 100644
--- a/man/to_rprof.Rd
+++ b/man/to_rprof.Rd
@@ -18,6 +18,8 @@ Path to pprof samples.
 Convert pprof samples to Rprof format.
 }
 \examples{
+if (identical(Sys.getenv("PROFFER_EXAMPLES"), "true")) {
 pprof <- record_pprof(replicate(1e2, sample.int(1e4)))
 to_rprof(pprof)
 }
+}