Update cheatsheets

gprof

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+---
+syntax: markdown
+tags: [tldr, common]
+source: https://github.com/tldr-pages/tldr.git
+---
+# gprof
+
+> Performance analysis tool for many programming languages.
+> It profiles the function executions of a program.
+> More information: <https://ftp.gnu.org/old-gnu/Manuals/gprof-2.9.1/html_mono/gprof.html>.
+
+- Compile binary with gprof information and run it to get `gmon.out`:
+
+`gcc -pg {{program.c}} && {{./a.out}}`
+
+- Run gprof to obtain profile output:
+
+`gprof`
+
+- Suppress profile field's description:
+
+`gprof -b`
+
+- Display routines that have zero usage:
+
+`gprof -bz`