updating docs to add summarize (#527)

* updating docs to add summarize

* add table

docs/profiling.md

@@ -13,6 +13,7 @@ when the feature flag is not enabled, you have an empty dummy implementation tha
 ## Prerequesites
 
 - [Crox](https://github.com/rust-lang/measureme/blob/master/crox/Readme.md)
+- [summarize (Optional)](https://github.com/rust-lang/measureme/blob/master/summarize/Readme.md)
 
 ## How To Use
 
@@ -23,6 +24,40 @@ You can run boa using the "profiler" feature flag to enable profiling. Seeing as
 Once finished you should see some trace files left in the directory (boa_cli in this case).  
 In the same directory as the `.events, string_data, string_index` files run `crox my_trace` or whatever the name of the files are. This will generate a chrome_profiler.json file, you can load this into Chrome Dev tools.
 
+### Summarize
+
+If you just want a summary of what functions were ran the most or where the most time was spent you can run `summarize`.  
+This is the same as above except instead of calling `$ crox my_trace` you call `$ summarize summzarize my_trace`. This will generate something like below:
+
+```
++---------------------------------------+-----------+-----------------+----------+------------+
+| Item                                  | Self time | % of total time | Time     | Item count |
++---------------------------------------+-----------+-----------------+----------+------------+
+| From<Object>                          | 1.04ms    | 14.776          | 1.04ms   | 146        |
++---------------------------------------+-----------+-----------------+----------+------------+
+| new_object                            | 356.50µs  | 5.082           | 533.50µs | 18         |
++---------------------------------------+-----------+-----------------+----------+------------+
+| create_instrinsics                    | 263.50µs  | 3.756           | 6.38ms   | 1          |
++---------------------------------------+-----------+-----------------+----------+------------+
+| make_builtin_fn: toString             | 218.50µs  | 3.114           | 290.50µs | 12         |
++---------------------------------------+-----------+-----------------+----------+------------+
+| Value::get_field                      | 178.60µs  | 2.546           | 340.20µs | 60         |
++---------------------------------------+-----------+-----------------+----------+------------+
+| Value::get_property                   | 161.60µs  | 2.303           | 161.60µs | 60         |
++---------------------------------------+-----------+-----------------+----------+------------+
+| lex                                   | 135.60µs  | 1.933           | 135.60µs | 1          |
++---------------------------------------+-----------+-----------------+----------+------------+
+| math:create                           | 125.40µs  | 1.787           | 1.11ms   | 1          |
++---------------------------------------+-----------+-----------------+----------+------------+
+| Value::set_field                      | 100.20µs  | 1.428           | 262.80µs | 8          |
++---------------------------------------+-----------+-----------------+----------+------------+
+| function::builtin                     | 82.40µs   | 1.175           | 82.40µs  | 146        |
++---------------------------------------+-----------+-----------------+----------+------------+
+| String                                | 81.60µs   | 1.163           | 961.60µs | 1          |
++---------------------------------------+-----------+-----------------+----------+------------+
+```
+
+
 ## More Info
 
 - https://blog.rust-lang.org/inside-rust/2020/02/25/intro-rustc-self-profile.html