Introduce the NO_PHYLO_DEBUG_LOGS flag

gargantext.cabal

@@ -50,6 +50,13 @@ flag disable-db-obfuscation-executable
   default: False
   manual: True
 
+-- When enabled, it suppresses at compile time the
+-- debug output for the phylo code, so that it doesn't
+-- hinder its performance.
+flag no-phylo-debug-logs
+  default: False
+  manual: True
+
 library
   exposed-modules:
       Gargantext
@@ -404,6 +411,8 @@ library
   ghc-options: -Wall -Wincomplete-uni-patterns -Wincomplete-record-updates -Wmissing-signatures -Wunused-binds -Wunused-imports -Werror -freduction-depth=300 -fprint-potential-instances
   if flag(test-crypto)
     cpp-options: -DTEST_CRYPTO
+  if flag(no-phylo-debug-logs)
+    cpp-options: -DNO_PHYLO_DEBUG_LOGS
   build-depends:
       HSvm ^>= 0.1.1.3.22
     , KMP ^>= 0.2.0.0