Profiling your PHP Application (PHPSC16)

So, you’ve been through and changed all your double quotes to single quotes but your application still isn’t running at the speed of light. What’s going on?

Making an application scale is generally seen as something that only the most magical of developers can do, but it’s easy once you have the correct tools. Fortunately for us, these tools are freely available online!

In this talk, we’ll take a look at a few options that we have available to work out what our application is actually doing, help identify bottlenecks and fix them so that we can move on to the more important part of the project: delivering features.

Transcript

1. Profiling PHP
   Michael Heap (@mheap)
   Developer at DataSift
   Presented at PHP South Coast, June 2016
   

   View Slide

2. Me!
   I’m Michael
   I’m @mheap
   Developer at DataSift
   

   View Slide

3. @mheap
   https://joind.in/18028
   

   View Slide

4. Disclaimer
   

   View Slide

5. Profiling PHP
   

   View Slide

6. Profiling Applications
   

   View Slide

7. We Won’t Cover
   Frontend optimisation
   Database queries
   TCP Negotiation
   

   View Slide

8. We Will Cover
   Quick wins
   Naive profiling
   XHProf
   XHGUI
   Other considerations
   

   View Slide

9. Quick Wins
   Things to do before you start profiling
   

   View Slide

10. $ php --go-faster
    

    View Slide

11. $ php --go-faster
    $ apt-get upgrade php
    $ yum upgrade php
    $ pacman -S php
    

    View Slide

12. Setting the scene
    

    View Slide

13. {
    “interaction”: {
    “content": "Hello World”,
    ”author”: {
    “name”: ”Michael"
    }
    }
    }
    

    View Slide

14. {
    “interaction”: {
    “content": "Hello World”,
    ”author”: {
    “name”: ”Michael"
    }
    }
    }
    [“interaction.content”, “interaction.author.name”]
    

    View Slide

15. {
    “interaction”: {
    “content": "Hello World”,
    ”author”: {
    “name”: ”Michael"
    }
    }
    }
    

    View Slide

16. {
    “interaction”: {
    “content": "Hello World”,
    ”author”: {
    “name”: ”Michael"
    }
    }
    }
    

    View Slide

17. {
    “interaction”: {
    “content": "Hello World”,
    ”author”: {
    “name”: ”Michael"
    }
    }
    }
    

    View Slide

18. {
    “interaction”: {
    “content": "Hello World”,
    ”author”: {
    “name”: ”Michael"
    }
    }
    }
    

    View Slide

19. {
    “interaction”: {
    “content": "Hello World”,
    ”author”: {
    “name”: ”Michael"
    }
    }
    }
    

    View Slide

20. [“interaction.content”]
    {
    “interaction”: {
    “content": "Hello World”,
    ”author”: {
    “name”: ”Michael"
    }
    }
    }
    

    View Slide

21. {
    “interaction”: {
    “content": "Hello World”,
    ”author”: {
    “name”: ”Michael"
    }
    }
    }
    [“interaction.content”]
    

    View Slide

22. {
    “interaction”: {
    “content": "Hello World”,
    ”author”: {
    “name”: ”Michael"
    }
    }
    }
    [“interaction.content”]
    

    View Slide

23. {
    “interaction”: {
    “content": "Hello World”,
    ”author”: {
    “name”: ”Michael"
    }
    }
    }
    [“interaction.content”]
    

    View Slide

24. {
    “interaction”: {
    “content": "Hello World”,
    ”author”: {
    “name”: ”Michael"
    }
    }
    }
    [“interaction.content”]
    

    View Slide

25. {
    “interaction”: {
    “content": "Hello World”,
    ”author”: {
    “name”: ”Michael"
    }
    }
    }
    [“interaction.content”]
    

    View Slide

26. {
    “interaction”: {
    “content": "Hello World”,
    ”author”: {
    “name”: ”Michael"
    }
    }
    }
    [“interaction.content”, “interaction.author.name”]
    

    View Slide

27. {
    "interaction": {
    "author": {
    "id": 115193554,
    "link": "http://hooliganstsar.tumblr.com/",
    "username": "hooliganstsar"
    },
    "content": "irhinoceri:\nWhen people try to discount Padme’s love for Anakin they completely ignore the fact that she says “stop come back I love you” even after she realizes that he’s committed murder and that he has delusions of grandeur where they become co-dictators.\nSure, it’s a desperate, emotional plea and not a promise that everything will return to normal. Not saying that. What I am saying is that she still loved him and believed there was
    good in him even after he destroyed the very republic that s...",
    "created_at": "Thu, 26 May 2016 15:12:31 +0000",
    "id": "1e6235444361a9808d6a8de10491c475",
    "link": "http://hooliganstsar.tumblr.com/post/144958725235",
    "media_type": "text",
    "received_at": 1464275553.0978,
    "schema": {
    "version": 3
    },
    "subtype": "post",
    "type": "tumblr"
    },
    "language": {
    "tag": "en",
    "tag_extended": "en",
    "confidence": 99
    },
    "salience": {
    "content": {
    "entities": [{
    "name": "Padme",
    "type": "Person",
    "label": "Person",
    "sentiment": -8,
    "evidence": 7,
    "confident": 1,
    "about": 1,
    "themes": ["flawed human", "committed murder", "n’t problematic", "justifiably upset", "Dark Side Anakin", "bad meta", "unemotional level", "space feminist", "true reason", "sentient beings", "including children", "political views cause"]
    }, {
    "name": "Obi Wan",
    "type": "Person",
    "label": "Person",
    "sentiment": 5,
    "evidence": 6,
    "confident": 1,
    "about": 0,
    "themes": ["loved Anakin", "Obikin shippers"]
    }, {
    "name": "“stop come back I love you”",
    "type": "Quote",
    "label": "Quote",
    "sentiment": 6,
    "evidence": 1,
    "confident": 1,
    "about": 0,
    "themes": ["committed murder", "emotional plea"]
    }, {
    "name": "“well I can respect this woman only if she loves the political system more than the person.”",
    "type": "Quote",
    "label": "Quote",
    "sentiment": 4,
    "evidence": 1,
    "confident": 1,
    "about": 0,
    "themes": ["political system", "problematic husband ffs", "flawed human", "n’t problematic"]
    }, {
    "name": "“space feminist”",
    "type": "Quote",
    "label": "Quote",
    "sentiment": 0,
    "evidence": 1,
    "confident": 1,
    "about": 0,
    "themes": ["true reason", "bad meta", "unemotional level", "space feminist", "sentient beings", "including children"]
    }, {
    "name": "“more.”",
    "type": "Quote",
    "label": "Quote",
    "sentiment": 0,
    "evidence": 1,
    "confident": 1,
    "about": 0,
    "themes": ["different motivations"]
    }],
    "sentiment": 0,
    "topics": [{
    "name": "Crime",
    "hits": 0,
    "score": 0.66876006126404,
    "additional": "irhinoceri: When people try to discount Padme’s love for Anakin they completely ignore the fact that she says “stop come back I love you” even after she realizes that he’s committed murder and that he has delusions of grandeur where they become co-dictators. It’s not like the republic wasn’t problematic itself so basically you’re pitting a flawed human being against a flawed political
    system and saying “well I can respect this woman only if she loves the political system more than the person.” T..."
    }]
    }
    },
    "tumblr": {
    "action": "create",
    "activity": "post",
    "blog": {
    "id": "115193554",
    "is_group_blog": false,
    "name": "hooliganstsar",
    "url": "http://hooliganstsar.tumblr.com/"
    },
    "blog_name": "hooliganstsar",
    "blogid": "115193554",
    "body": "irhinoceri:\n\nWhen people try to discount Padme’s love for Anakin they completely ignore the fact that she says “stop come back I love you” even after she realizes that he’s committed murder and that he has delusions of grandeur where they become co-dictators.\nSure, it’s a desperate, emotional plea and not a promise that everything will return to normal. Not saying that. What I am saying is that she still loved him and believed there was
    good in him even after he destroyed the very republic that ...",
    "created_at": "Thu, 26 May 2016 15:12:31 +0000",
    "format": "html",
    "id": "000533c038212bbbfd64395be146f382",
    "is_submission": false,
    "note_count": 397,
    "post": {
    "id": "144958725235",
    "url": "http://hooliganstsar.tumblr.com/post/144958725235"
    },
    "post_url": "http://hooliganstsar.tumblr.com/post/144958725235",
    "postid": "144958725235",
    "reblogged": {
    "parent": {
    "blogid": "44626114",
    "id": "144958505451",
    "name": "imaginal",
    "url": "http://imaginal.tumblr.com/post/144958505451"
    },
    "root": {
    "blogid": "23604722",
    "id": "140021104712",
    "name": "irhinoceri",
    "url": "http://irhinoceri.tumblr.com/post/140021104712"
    },
    "source": {
    "blogid": "115193554"
    }
    },
    "short_url": "https://tmblr.co/ZgfWkr270Dfnp",
    "slug": "irhinoceri-when-people-try-to-discount-padmes",
    "source_title": "irhinoceri",
    "source_url": "http://irhinoceri.tumblr.com/post/140021104712/when-people-try-to-discount-padmes-love-for",
    "type": "text",
    "url": "https://tmblr.co/ZgfWkr270Dfnp"
    }
    }
    

    View Slide

28. Time limited
    Resource limited
    Fixed amount of data
    

    View Slide

29. Test harness
    

    View Slide

30. Example data
    

    View Slide

31. $start = microtime(true);
    $input = file_get_contents('./small.json');
    foreach (explode("\n", $input) as $line){
    $tmp = json_decode($line, true);
    if ($tmp) { $data[] = $tmp; }
    }
    echo "Took: ". (microtime(true) - $start);
    

    View Slide

32. $start = microtime(true);
    $input = file_get_contents('./small.json');
    foreach (explode("\n", $input) as $line){
    $tmp = json_decode($line, true);
    if ($tmp) { $data[] = $tmp; }
    }
    echo "Took: ". (microtime(true) - $start);
    

    View Slide

33. $start = microtime(true);
    $input = file_get_contents('./small.json');
    foreach (explode("\n", $input) as $line){
    $tmp = json_decode($line, true);
    if ($tmp) { $data[] = $tmp; }
    }
    echo "Took: ". (microtime(true) - $start);
    

    View Slide

34. $start = microtime(true);
    $input = file_get_contents('./small.json');
    foreach (explode("\n", $input) as $line){
    $tmp = json_decode($line, true);
    if ($tmp) { $data[] = $tmp; }
    }
    echo "Took: ". (microtime(true) - $start);
    

    View Slide

35. $start = microtime(true);
    $input = file_get_contents('./small.json');
    foreach (explode("\n", $input) as $line){
    $tmp = json_decode($line, true);
    if ($tmp) { $data[] = $tmp; }
    }
    echo "Took: ". (microtime(true) - $start);
    

    View Slide

36. Run Times
    50,000 items: 5.7440850734711
    50,000 items: 5.8537809848785
    50,000 items: 5.5094730854034
    50,000 items: 5.8217489719391
    50,000 items: 5.8287329673767
    

    View Slide

37. $start = microtime(true);
    $input = file_get_contents('./small.json');
    foreach (explode("\n", $input) as $line){
    $tmp = json_decode($line, true);
    if ($tmp) { $data[] = $tmp; }
    }
    echo "Took: ". (microtime(true) - $start);
    

    View Slide

38. $start = microtime(true);
    $input = file_get_contents('./small.json');
    foreach (explode("\n", $input) as $line){
    $tmp = json_decode($line, true);
    if ($tmp) { $data[] = $tmp; }
    }
    echo "Took: ". (microtime(true) - $start);
    

    View Slide

39. if (file_exists("./cache")){
    $data = json_decode(
    file_get_contents("./cache"), true
    );
    } else {
    $input = file_get_contents('./small.json');
    foreach (explode("\n", $input) as $line){
    // Decode and add to array
    }
    file_put_contents("./cache",
    json_encode($data)
    );
    }
    

    View Slide

40. Run Times
    Without Cache: 11.717740058899
    With Cache: 8.7964880466461
    

    View Slide

41. Guessing
    

    View Slide

42. XHProf
    sudo pecl install xhprof-0.9.4
    extension=xhprof.so
    /usr/share/php/xhprof_lib
    

    View Slide

43. xhprof_enable(
    XHPROF_FLAGS_CPU +
    XHPROF_FLAGS_MEMORY
    )
    

    View Slide

44. $data = xhprof_disable();
    print_r($data);
    

    View Slide

45. [main()==>json_decode] => Array
    (
    [ct] => 50001
    [wt] => 4379326
    [cpu] => 4710383
    [mu] => 807834192
    [pmu] => 807572808
    )
    

    View Slide

46. include_once '/usr/share/php/xhprof_lib/utils/
    xhprof_lib.php';
    include_once '/usr/share/php/xhprof_lib/utils/
    xhprof_runs.php';
    $runs = new XHProfRuns_Default();
    $runs->save_run($xhprof_data, "michael");
    

    View Slide

47. No Cache
    

    View Slide

48. Total Incl. Wall Time (microsec): 12,638,896 microsecs
    Total Incl. CPU (microsecs): 9,692,792 microsecs
    Total Incl. MemUse (bytes): 929,483,336 bytes
    Total Incl. PeakMemUse (bytes): 1,170,441,880 bytes
    Number of Function Calls: 50,008
    No Cache
    

    View Slide

49. Total Incl. Wall Time (microsec): 9,473,467 microsecs
    Total Incl. CPU (microsecs): 7,010,122 microsecs
    Total Incl. MemUse (bytes): 815,163,360 bytes
    Total Incl. PeakMemUse (bytes): 935,510,968 bytes
    Number of Function Calls: 5
    Cache
    

    View Slide

50. No Cache
    

    View Slide

51. No Cache
    

    View Slide

52. No Cache
    

    View Slide

53. No Cache
    Cache
    

    View Slide

54. Back to the task
    

    View Slide

55. {
    “interaction”: {
    “content": "Hello World”,
    ”author”: {
    “name”: ”Michael"
    }
    }
    }
    [“interaction.content”, “interaction.author.name”]
    

    View Slide

56. Version 1
    

    View Slide

57. public function generate($interaction, $parents = []) {
    $keys = [];
    foreach ($interaction as $k => $v) {
    $newFields = [];
    if (!is_numeric($k)) {
    $newFields[] = $k;
    }
    if (is_array($v) || is_object($v)) {
    $keys = array_merge($keys, $this->generate($v,
    array_merge($parents, $newFields)));
    } else {
    $keys[] = implode(array_merge($parents ,$newFields), ".");
    }
    }
    return $keys;
    }
    

    View Slide

58. public function generate($interaction, $parents = []) {
    $keys = [];
    foreach ($interaction as $k => $v) {
    $newFields = [];
    if (!is_numeric($k)) {
    $newFields[] = $k;
    }
    if (is_array($v) || is_object($v)) {
    $keys = array_merge($keys, $this->generate($v,
    array_merge($parents, $newFields)));
    } else {
    $keys[] = implode(array_merge($parents ,$newFields), ".");
    }
    }
    return $keys;
    }
    

    View Slide

59. public function generate($interaction, $parents = []) {
    $keys = [];
    foreach ($interaction as $k => $v) {
    $newFields = [];
    if (!is_numeric($k)) {
    $newFields[] = $k;
    }
    if (is_array($v) || is_object($v)) {
    $keys = array_merge($keys, $this->generate($v,
    array_merge($parents, $newFields)));
    } else {
    $keys[] = implode(array_merge($parents ,$newFields), ".");
    }
    }
    return $keys;
    }
    

    View Slide

60. public function generate($interaction, $parents = []) {
    $keys = [];
    foreach ($interaction as $k => $v) {
    $newFields = [];
    if (!is_numeric($k)) {
    $newFields[] = $k;
    }
    if (is_array($v) || is_object($v)) {
    $keys = array_merge($keys, $this->generate($v,
    array_merge($parents, $newFields)));
    } else {
    $keys[] = implode(array_merge($parents ,$newFields), ".");
    }
    }
    return $keys;
    }
    

    View Slide

61. public function generateAll($interactions) {
    $all = [];
    foreach ($interactions as $i) {
    $all = array_merge($all, $this->generate($i));
    }
    return array_filter(array_unique($all));
    }
    

    View Slide

62. public function generateAll($interactions) {
    $all = [];
    foreach ($interactions as $i) {
    $all = array_merge($all, $this->generate($i));
    }
    return array_filter(array_unique($all));
    }
    

    View Slide

63. public function generateAll($interactions) {
    $all = [];
    foreach ($interactions as $i) {
    $all = array_merge($all, $this->generate($i));
    }
    return array_filter(array_unique($all));
    }
    

    View Slide

64. Total Incl. Wall Time (microsec): 8,046,823 microsecs
    Total Incl. CPU (microsecs): 8,018,211 microsecs
    Total Incl. MemUse (bytes): 19,617,760 bytes
    Total Incl. PeakMemUse (bytes): 37,543,384 bytes
    Number of Function Calls: 355,764
    

    View Slide

65. public function generate($interaction, $parents = []) {
    $keys = [];
    foreach ($interaction as $k => $v) {
    $newFields = [];
    if (!is_numeric($k)) {
    $newFields[] = $k;
    }
    if (is_array($v) || is_object($v)) {
    $keys = array_merge($keys, $this->generate($v,
    array_merge($parents, $newFields)));
    } else {
    $keys[] = implode(array_merge($parents ,$newFields), ".");
    }
    }
    return $keys;
    }
    

    View Slide

66. View Slide

67. View Slide

68. Version 2
    

    View Slide

69. public function generate($interaction, $parents = []) {
    $keys = [];
    foreach ($interaction as $k => $v) {
    $newFields = [];
    if (!is_numeric($k)) {
    $newFields[] = $k;
    }
    if (is_array($v) || is_object($v)) {
    $keys = array_merge($keys, $this->generate($v,
    array_merge($parents, $newFields)));
    } else {
    $keys[] = implode(array_merge($parents ,$newFields), ".");
    }
    }
    return $keys;
    }
    

    View Slide

70. public function generate($interaction, $parents = []) {
    $keys = [];
    foreach ($interaction as $k => $v) {
    $newFields = [];
    if (!is_numeric($k)) {
    $newFields[] = $k;
    }
    if (is_array($v) || is_object($v)) {
    foreach ($this->generate($v, array_merge($parents, $newFields)
    as $val) { $keys[] = $val; }
    } else {
    $keys[] = implode(array_merge($parents ,$newFields), ".");
    }
    }
    return $keys;
    }
    

    View Slide

71. public function generateAll($interactions) {
    $all = [];
    foreach ($interactions as $i) {
    $all = array_merge($all, $this->generate($i));
    }
    return array_filter(array_unique($all));
    }
    

    View Slide

72. public function generateAll($interactions) {
    $all = [];
    foreach ($interactions as $i) {
    foreach ($this->generate($i) as $g){
    $all[] = $g;
    }
    }
    return array_filter(array_unique($all));
    }
    

    View Slide

73. Total Incl. Wall Time (microsec): 3,617,157 microsecs
    Total Incl. CPU (microsecs): 3,539,472 microsecs
    Total Incl. MemUse (bytes): 20,135,232 bytes
    Total Incl. PeakMemUse (bytes): 37,407,936 bytes
    Number of Function Calls: 334,278
    

    View Slide

74. View Slide

75. View Slide

76. Version 2.5
    

    View Slide

77. public function generate($interaction, $parents = []) {
    $keys = [];
    foreach ($interaction as $k => $v) {
    $newFields = [];
    if (!is_numeric($k)) {
    $newFields[] = $k;
    }
    if ($v instanceof Traversable) {
    foreach ($this->generate($v, array_merge($parents, $newFields)
    as $val) { $keys[] = $val; }
    } else {
    $keys[] = implode(array_merge($parents ,$newFields), ".");
    }
    }
    return $keys;
    }
    

    View Slide

78. Total Incl. Wall Time (microsec): 274,998 microsecs
    Total Incl. CPU (microsecs): 221,910 microsecs
    Total Incl. MemUse (bytes): 19,510,464 bytes
    Total Incl. PeakMemUse (bytes): 22,173,048 bytes
    Number of Function Calls: 10,922
    

    View Slide

79. Version 3
    

    View Slide

80. public function generate($interaction, $parents = []) {
    $keys = [];
    foreach ($interaction as $k => $v) {
    $newFields = [];
    if (!is_numeric($k)) {
    $newFields[] = $k;
    }
    if (is_array($v) || is_object($v)) {
    foreach ($this->generate($v, array_merge($parents, $newFields)
    as $val) { $keys[] = $val; }
    } else {
    $keys[] = implode(array_merge($parents ,$newFields), ".");
    }
    }
    return $keys;
    }
    

    View Slide

81. public function generate($interaction, $parents = []) {
    $keys = [];
    foreach ($interaction as $k => $v) {
    $newFields = [];
    if (!is_numeric($k)) {
    $newFields[] = $k;
    }
    if (!is_scalar($v)) {
    foreach ($this->generate($v, array_merge($parents, $newFields)
    as $val) { $keys[] = $val; }
    } else {
    $keys[] = implode(array_merge($parents ,$newFields), ".");
    }
    }
    return $keys;
    }
    

    View Slide

82. Total Incl. Wall Time (microsec): 2,926,818 microsecs
    Total Incl. CPU (microsecs): 2,857,804 microsecs
    Total Incl. MemUse (bytes): 20,126,960 bytes
    Total Incl. PeakMemUse (bytes): 37,362,384 bytes
    Number of Function Calls: 284,214
    

    View Slide

83. Total Incl. Wall Time (microsec): 3,617,157 microsecs
    Total Incl. CPU (microsecs): 3,539,472 microsecs
    Total Incl. MemUse (bytes): 20,135,232 bytes
    Total Incl. PeakMemUse (bytes): 37,407,936 bytes
    Number of Function Calls: 334,278
    

    View Slide

84. Total Incl. Wall Time (microsec): 2,926,818 microsecs
    Total Incl. CPU (microsecs): 2,857,804 microsecs
    Total Incl. MemUse (bytes): 20,126,960 bytes
    Total Incl. PeakMemUse (bytes): 37,362,384 bytes
    Number of Function Calls: 284,214
    

    View Slide

85. Version 4
    

    View Slide

86. Total Incl. Wall Time (microsec): 8,046,823 microsecs
    Total Incl. CPU (microsecs): 8,018,211 microsecs
    Total Incl. MemUse (bytes): 19,617,760 bytes
    Total Incl. PeakMemUse (bytes): 37,543,384 bytes
    Number of Function Calls: 355,764
    

    View Slide

87. Total Incl. Wall Time (microsec): 1,274,903 microsecs
    Total Incl. CPU (microsecs): 1,195,136 microsecs
    Total Incl. MemUse (bytes): 20,086,232 bytes
    Total Incl. PeakMemUse (bytes): 34,597,576 bytes
    Number of Function Calls: 93,053
    

    View Slide

88. $currentDepth = [];
    foreach($parents as $x){ $currentDepth[] = $x; }
    foreach($newFields as $x){ $currentDepth[] = $x; }
    

    View Slide

89. $xx = \gettype($v)[0];
    if ($xx == 'a' || $xx == 'o') {
    

    View Slide

90. XHProf UI
    

    View Slide

91. View Slide

92. View Slide

93. View Slide

94. View Slide

95. XHGui
    

    View Slide

96. View Slide

97. View Slide

98. View Slide

99. View Slide

100. View Slide

101. View Slide

102. blackfire.io
     

     View Slide

103. View Slide

104. View Slide

105. View Slide

106. View Slide

107. View Slide

108. View Slide

109. View Slide

110. View Slide

111. Production friendly
     

     View Slide

112. Read more
     https://www.colinodell.com/blog/2015-11/
     optimizing-league-commonmark-blackfire-io
     

     View Slide

113. XDebug/Cachegrind
     tideways.io
     New Relic
     Zend Z-Ray
     PHP Bench
     Other Tools
     

     View Slide

114. Observer effect
     

     View Slide

115. Optimisation
     

     View Slide

116. Caching
     The fastest code is code that doesn't run
     

     View Slide

117. Should it run?
     The fastest code is code that doesn't run
     

     View Slide

118. Async Workers
     Gearman
     Beanstalkd
     RabbitMQ
     ZeroMQ
     

     View Slide

119. Logging
     Work out which code paths are popular
     Optimise them
     

     View Slide

120. Measuring Production
     Enable 1 in 1000 requests with XHProf
     Blackfire production mode (with header)
     

     View Slide

121. Used/available memory
     Response time
     Timeout
     Successful/failed requests
     Open socket count
     Bandwidth usage
     Track Everything
     

     View Slide

122. Profile Everything
     Framework bootstrapping
     Business logic
     Unit tests
     

     View Slide

123. Measure
     Refactor
     Measure again
     Process
     

     View Slide

124. “Without measurements,
     you’re just guessing”
     

     View Slide

125. Is it worth it?
     

     View Slide

126. Usually, no
     

     View Slide

127. View Slide

128. Thanks!
     I’ve been @mheap, you’ve been awesome.
     Please leave feedback on Joind.in
     https://joind.in/18028
     

     View Slide