Allow channel_threads to be configured and increase pool_size

config/config.yml

@@ -1,4 +1,5 @@
-pool_size: 10
+pool_size: 20
+channel_threads: 5
 threads: 5
 db:
   user: kemal

src/helpers.cr

@@ -17,6 +17,7 @@ class Config
   YAML.mapping({
     pool_size:       Int32,
     threads:         Int32,
+    channel_threads: Int32,
     db:              NamedTuple(
       user: String,
       password: String,

src/invidious.cr

@@ -27,7 +27,7 @@ CONFIG = Config.from_yaml(File.read("config/config.yml"))
 
 pool_size = CONFIG.pool_size
 threads = CONFIG.threads
-channel_threads = 10
+channel_threads = CONFIG.channel_threads
 
 Kemal.config.extra_options do |parser|
   parser.banner = "Usage: invidious [arguments]"
@@ -47,6 +47,14 @@ Kemal.config.extra_options do |parser|
       exit
     end
   end
+  parser.on("-c THREADS", "--channel-threads=THREADS", "Number of threads for refreshing channels (default: #{channel_threads})") do |number|
+    begin
+      channel_threads = number.to_i
+    rescue ex
+      puts "THREADS must be integer"
+      exit
+    end
+  end
 end
 
 Kemal::CLI.new