bench: Add some very simple manual benchmarking helpers

This includes a profiler addon that we might consider for promotion to a
builtin down the track.

test/bench/.gitignore

@@ -0,0 +1 @@
+results

test/bench/README.md

@@ -0,0 +1,56 @@
+
+This directory contains a set of tools for benchmarking and profiling mitmproxy.
+At the moment, this is simply to give developers a quick way to see the impact
+of their work. Eventually, this might grow into a performance dashboard with
+historical data, so we can track performance over time.
+
+
+# Setup
+
+Install the following tools:
+
+    go get -u github.com/rakyll/hey
+    go get github.com/cortesi/devd/cmd/devd
+
+You may also want to install snakeviz to make viewing profiles easier:
+
+    pip install snakeviz
+
+In one window, run the devd server:
+
+    ./backend
+
+
+# Running tests
+
+Each run consists of two files - a mitproxy invocation, and a traffic generator.
+Make sure the backend is started, then run the proxy:
+
+    ./simple.mitmproxy
+
+Now run the traffic generator:
+
+    ./simple.traffic
+
+After the run is done, quit the proxy with ctrl-c.
+
+
+# Reading results
+
+Results are placed in the ./results directory. You should see two files - a
+performance log from **hey**, and a profile. You can view the profile like so:
+
+    snakeviz ./results/simple.prof
+
+
+
+
+
+
+
+
+
+
+
+
+

test/bench/backend

@@ -0,0 +1,3 @@
+#!/bin/sh
+
+devd -p 10001 .

test/bench/profiler.py

@@ -0,0 +1,25 @@
+import cProfile
+from mitmproxy import ctx
+
+
+class Profile:
+    """
+        A simple profiler addon.
+    """
+    def __init__(self):
+        self.pr = cProfile.Profile()
+
+    def load(self, loader):
+        loader.add_option(
+            "profile_path",
+            str,
+            "/tmp/profile",
+            "Destination for the run profile, saved at exit"
+        )
+        self.pr.enable()
+
+    def done(self):
+        self.pr.dump_stats(ctx.options.profile_path)
+
+
+addons = [Profile()]

test/bench/simple.mitmproxy

@@ -0,0 +1,5 @@
+#!/bin/sh
+
+mkdir -p results
+mitmdump -p 10002 --mode reverse:http://devd.io:10001 \
+    -s ./profiler.py --set profile_path=./results/simple.prof

test/bench/simple.traffic

@@ -0,0 +1,3 @@
+#!/bin/sh
+
+hey -disable-keepalive http://localhost:10002/profiler.py | tee ./results/simple.perf