More test changes.

peek.py

+#! /usr/bin/env python
+# -*- coding: utf-8 -*-
+# vim:fenc=utf-8
+
+from __future__ import unicode_literals
+
+"""
+Test script to peek in db files.
+"""
+
+import struct
+import os
+import mmap
+
+filename = 'metrics/gauge_livesum_40272.db'
+f = open(filename, 'a+b')
+capacity = os.fstat(f.fileno()).st_size
+m = mmap.mmap(f.fileno(), capacity)
+used = struct.unpack_from(b'i', m, 0)[0]
+
+pos = 8
+while pos < used:
+  encoded_len = struct.unpack_from(b'i', m, pos)[0]
+  pos += 4
+  encoded = struct.unpack_from('{0}s'.format(encoded_len).encode(), m, pos)[0]
+  padded_len = encoded_len + (8 - (encoded_len + 4) % 8)
+  pos += padded_len
+  value = struct.unpack_from(b'd', m, pos)[0]
+  print("Entry: %s = %d" % (encoded, value))
+  pos += 8
+
+f.close()
+
+print("Capacity %s" % capacity)
+print("Used %d" % used)

ruby/Gemfile

+# frozen_string_literal: true
+source "https://rubygems.org"
+
+gem 'mmap', git: 'https://github.com/lyda/mmap.git', :branch => 'non-global-version'
+#gem 'mmap', :path => '/Users/kevin/src/p4g/mmap'

ruby/Gemfile.lock

+GIT
+  remote: https://github.com/lyda/mmap.git
+  revision: 379bdbd2c848e96d8f89e954663b8c26529b8919
+  branch: non-global-version
+  specs:
+    mmap (0.2.7)
+
+GEM
+  remote: https://rubygems.org/
+  specs:
+
+PLATFORMS
+  ruby
+
+DEPENDENCIES
+  mmap!
+
+BUNDLED WITH
+   1.14.3

ruby/test.rb

+require 'mmap'
+
+mmap = Mmap.new(__FILE__)
+mmap.advise(Mmap::MADV_SEQUENTIAL)
+
+mmap.each do |line|
+  puts line
+end