first version of the speed regression test

diff --git a/utils/speed-regression.tcl b/utils/speed-regression.tcl
new file mode 100755 (executable)
index 0000000..503a079
--- /dev/null
+++ b/utils/speed-regression.tcl
@@ -0,0 +1,85 @@
+#!/usr/bin/env tclsh8.5
+# Copyright (C) 2011 Salvatore Sanfilippo
+# Released under the BSD license like Redis itself
+
+proc run-tests branches {
+    set runs {}
+    set branch_id 0
+    foreach b $branches {
+        cd ../src
+        puts "Benchmarking $b"
+        exec -ignorestderr git checkout $b 2> /dev/null
+        exec -ignorestderr make clean 2> /dev/null
+        puts "  compiling..."
+        exec -ignorestderr make 2> /dev/null
+
+        if {$branch_id == 0} {
+            puts "  copy redis-benchmark from unstable to /tmp..."
+            exec -ignorestderr cp ./redis-benchmark /tmp
+            incr branch_id
+            continue
+        }
+
+        # Start the Redis server
+        puts "  starting the server... [exec ./redis-server -v]"
+        set pids [exec echo "port 12123\nloglevel warning\n" | ./redis-server - > /dev/null 2> /dev/null &]
+        after 1000
+        puts "  running the benchmark"
+        set output [exec /tmp/redis-benchmark -n 100000 --csv -p 12123]
+        lappend runs $b $output
+        puts "  killing server..."
+        catch {
+            exec kill -9 [lindex $pids 0]
+            exec kill -9 [lindex $pids 1]
+        }
+        incr branch_id
+    }
+    return $runs
+}
+
+proc get-result-with-name {output name} {
+    foreach line [split $output "\n"] {
+        lassign [split $line ","] key value
+        set key [string tolower [string range $key 1 end-1]]
+        set value [string range $value 1 end-1]
+        if {$key eq [string tolower $name]} {
+            return $value
+        }
+    }
+    return "n/a"
+}
+
+proc combine-results {results} {
+    set tests {
+        ping set get incr lpush lpop sadd spop
+        "lrange (first 100 elements)"
+        "lrange (first 600 elements)"
+        "mset (10 keys)"
+    }
+    foreach test $tests {
+        puts $test
+        foreach {branch output} $results {
+            puts [format "%-20s %s" \
+                $branch [get-result-with-name $output $test]]
+        }
+        puts {}
+    }
+}
+
+proc main {} {
+    # Note: the first branch is only used in order to get the redis-benchmark
+    # executable. Tests are performed starting from the second branch.
+    set branches {
+        slowset 2.2.0 2.4.0 unstable slowset
+    }
+    set results [run-tests $branches]
+    puts [combine-results $results]
+}
+
+# Force the user to run the script from the 'utils' directory.
+if {![file exists speed-regression.tcl]} {
+    puts "Please make sure to run speed-regression.tcl while inside /utils."
+    puts "Example: cd utils; ./speed-regression.tcl"
+    exit 1
+}
+main