Use recursive grep in the no-shell example

README.md

@@ -33,9 +33,8 @@ hyperfine 'sleep 0.3'
 ```
 
 Hyperfine will automatically determine the number of runs to perform for each command. By default,
-it will perform *at least* 10 benchmarking runs and estimate a run count targeting roughly
-3 seconds, including shell overhead and preparation and conclusion commands. To set an exact
-number of runs, you can use the `-r`/`--runs` option:
+it will perform *at least* 10 benchmarking runs and measure for at least 3 seconds. To change this,
+you can use the `-r`/`--runs` option:
 ```sh
 hyperfine --runs 5 'sleep 0.3'
 ```
@@ -105,7 +104,7 @@ If you want to run a benchmark *without an intermediate shell*, you can use the
 option. This is helpful for very fast commands (< 5 ms) where the shell startup overhead correction would
 produce a significant amount of noise. Note that you cannot use shell syntax like `*` or `~` in this case.
 ```
-hyperfine -N 'grep TODO /home/user'
+hyperfine -N 'grep -R TODO /home/user'
 ```