use io (stderr chanel) instead of file on benchmark (#365)

tools/pipeline.lua

@@ -17,7 +17,6 @@
 -- percentile : 99.999
 
 done = function(summary, latency, requests)
-  file = io.open('/tmp/which_is_the_fastest.out', 'w')
 
   out = {
     summary.duration,
@@ -41,10 +40,9 @@ done = function(summary, latency, requests)
 
   for key, value in pairs(out) do
     if key > 1 then
-      file:write(",")
+      io.stderr:write(",")
     end
-    file:write(string.format("%d", value))
+    io.stderr:write(string.format("%d", value))
   end
 
-  file.close(file)
 end

tools/pipeline_post.lua

@@ -21,7 +21,6 @@ wrk.headers["Content-Type"] = "application/x-www-form-urlencoded"
 -- percentile : 99.999
 
 done = function(summary, latency, requests)
-  file = io.open('/tmp/which_is_the_fastest.out', 'w')
 
   out = {
     summary.duration,
@@ -45,10 +44,9 @@ done = function(summary, latency, requests)
 
   for key, value in pairs(out) do
     if key > 1 then
-      file:write(",")
+      io.stderr:write(",")
     end
-    file:write(string.format("%d", value))
+    io.stderr:write(string.format("%d", value))
   end
 
-  file.close(file)
 end

tools/src/benchmarker.cr

@@ -348,23 +348,16 @@ ranks_by_requests.each do |framework|
   puts_markdown "| %-25s | %-25s | %.2f | %.2f MB |" % [framework.target.lang, framework.target.name, result.request.per_second, (result.request.bytes/1000000)], m_lines, true
 end
 
-  ranks_by_requests.each do |framework|
-    raw = store.get("#{framework.target.lang}:#{framework.target.name}").as(String)
-    result = Result.from_json(raw)
-    puts_markdown "| %-25s | %-25s | %.2f | %.2f MB |" % [framework.target.lang, framework.target.name, result.request.per_second, (result.request.bytes/1000000)], m_lines, true
-  end
-
-
-  if record
-    path = File.expand_path("../../../README.md", __FILE__)
-    tag_from = "<!-- Result from here -->"
-    tag_till = "<!-- Result till here -->"
-    m_lines.insert(0, tag_from)
-    m_lines.push(tag_till)
-    prev_readme = File.read(path)
-    next_readme = prev_readme.gsub(
-      /\<!--\sResult\sfrom\shere\s-->[\s\S]*?<!--\sResult\still\shere\s-->/,
-      m_lines.join('\n'))
+if record
+  path = File.expand_path("../../../README.md", __FILE__)
+  tag_from = "<!-- Result from here -->"
+  tag_till = "<!-- Result till here -->"
+  m_lines.insert(0, tag_from)
+  m_lines.push(tag_till)
+  prev_readme = File.read(path)
+  next_readme = prev_readme.gsub(
+    /\<!--\sResult\sfrom\shere\s-->[\s\S]*?<!--\sResult\still\shere\s-->/,
+    m_lines.join('\n'))
 
   File.write(path, next_readme)
 end

tools/src/client.cr

@@ -39,13 +39,14 @@ class Client
 
   def run
     if @method == "POST"
-      `wrk -H 'Connection: keep-alive' --latency -d #{@duration}s -s #{PIPELINE_POST} -c #{@connections.to_i} --timeout 8 -t #{@threads} #{@url}`
+      command = "wrk -H 'Connection: keep-alive' --latency -d #{@duration}s -s #{PIPELINE_POST} -c #{@connections.to_i} --timeout 8 -t #{@threads} #{@url}"
     else
-      `wrk -H 'Connection: keep-alive' --latency -d #{@duration}s -s #{PIPELINE_GET} -c #{@connections.to_i} --timeout 8 -t #{@threads} #{@url}`
+      command = "wrk -H 'Connection: keep-alive' --latency -d #{@duration}s -s #{PIPELINE_GET} -c #{@connections.to_i} --timeout 8 -t #{@threads} #{@url}"
     end
+    io = IO::Memory.new
+    Process.run(command, shell: true, error: io)
 
-    result = File.read("/tmp/which_is_the_fastest.out").split(",")
-    File.delete("/tmp/which_is_the_fastest.out")
+    result = io.to_s.split(",")
 
     data = JSON.build do |json|
       json.object do