Cache the parsing of all JSON files (to avoid parsing it several times per run)

=> huge performance improvement

generators/wiki/cpu_parameters.rb

@@ -12,7 +12,7 @@ class CPUParametersGenerator < WikiGenerator
 
     table_columns = ["Installation date", "Site", "Cluster", "CPU Family", "CPU Version", "Microarchitecture", "Frequency", "Server type", "HT enabled", "Turboboost enabled", "P-State driver", "C-State driver"]
     table_data = []
-    global_hash = load_yaml_file_hierarchy(File.expand_path("../../input/grid5000/", File.dirname(__FILE__)))
+    global_hash = get_global_hash
 
     # Loop over Grid'5000 sites
     global_hash["sites"].sort.to_h.each { |site_uid, site_hash|

generators/wiki/disk_reservation.rb

@@ -12,7 +12,7 @@ class DiskReservationGenerator < WikiGenerator
   def generate_content
     table_columns = ["Site", "Cluster", "Number of nodes", "Number of reservable disks per node"]
     table_data = []
-    global_hash = load_yaml_file_hierarchy(File.expand_path("../../input/grid5000/", File.dirname(__FILE__)))
+    global_hash = get_global_hash
 
     # Loop over Grid'5000 sites
     global_hash["sites"].sort.to_h.each { |site_uid, site_hash|

generators/wiki/hardware.rb

@@ -12,7 +12,7 @@ class G5KHardwareGenerator < WikiGenerator
   end
 
   def generate_content
-    @global_hash = load_yaml_file_hierarchy(File.expand_path('../../input/grid5000/', File.dirname(__FILE__)))
+    @global_hash = get_global_hash
     @site_uids = G5K::SITES
     
     @generated_content = "__NOEDITSECTION__\n"

generators/wiki/mw_utils.rb

@@ -59,8 +59,6 @@ end
 #Defines global Grid5000 helpers (TODO move to its own file once it is big enough)
 module G5K
 
-  SITES = load_yaml_file_hierarchy(File.expand_path("../../input/grid5000/", File.dirname(__FILE__)))['sites'].keys.sort
-  
   # This method compacts an array of integers as follows
   # nodeset([2,3,4,7,9,10,12]) returns the string '[2-4,<wbr>7,<wbr>9-10,<wbr>12]'
   # where <wbr> is a hidden tag that enables carriage return in wikimedia
@@ -108,6 +106,16 @@ module G5K
     return (count == 1 || word[-1] == 's') ? word : word + 's'
   end
   
+  @@global_hash = nil
+  def self.get_global_hash
+    if @@global_hash.nil?
+      @@global_hash = load_yaml_file_hierarchy(File.expand_path("../../input/grid5000/", File.dirname(__FILE__)))
+    end
+    # return a deep copy of global_hash
+    return Marshal.load(Marshal.dump(@@global_hash))
+  end
+
+  SITES = get_global_hash['sites'].keys.sort
 end
 
 #Defines MediaWiki helpers

generators/wiki/oar_properties.rb

@@ -173,7 +173,7 @@ class OarPropertiesGenerator < WikiGenerator
   end
 
   def generate_content
-    refapi = load_yaml_file_hierarchy(File.expand_path("../../input/grid5000/", File.dirname(__FILE__)))
+    refapi = get_global_hash
     #Properties generated from oar-properties generator
     props = {}
     G5K::SITES.each{ |site_uid|

generators/wiki/site_hardware.rb

@@ -160,7 +160,7 @@ def sort_data(data, key)
 end
 
 def get_hardware(sites)
-  global_hash = load_yaml_file_hierarchy(File.expand_path("../../input/grid5000/", File.dirname(__FILE__)))
+  global_hash = G5K::get_global_hash
   
   # Loop over each cluster of the site
   hardware = {}

generators/wiki/wiki_generator.rb

@@ -11,6 +11,10 @@ class WikiGenerator
     @page_name = page_name
   end
 
+  def get_global_hash
+    return G5K::get_global_hash
+  end
+
   def login(options)
     if (options[:user] && options[:pwd])
       @mw_client.log_in(options[:user], options[:pwd])