Config options for hex enc/dec fastpath

config/config-options/DUK_USE_HEX_FASTPATH.yaml

@@ -0,0 +1,10 @@
+define: DUK_USE_HEX_FASTPATH
+introduced: 1.4.0
+default: true
+tags:
+  - performance
+  - fastpath
+  - lowmemory
+description: >
+  Enable fast path for hex encode/decode.  The fast path uses a lookup
+  table at a small cost in footprint.

config/examples/low_memory.yaml

@@ -26,6 +26,7 @@ DUK_USE_JSON_DECSTRING_FASTPATH: false
 DUK_USE_JSON_DECNUMBER_FASTPATH: false
 DUK_USE_JSON_EATWHITE_FASTPATH: false
 DUK_USE_BASE64_FASTPATH: false
+DUK_USE_HEX_FASTPATH: false
 DUK_USE_BYTECODE_DUMP_SUPPORT: false
 DUK_USE_JX: false
 DUK_USE_JC: false

config/examples/performance_sensitive.yaml

@@ -14,6 +14,7 @@ DUK_USE_JSON_DECSTRING_FASTPATH: true
 DUK_USE_JSON_DECNUMBER_FASTPATH: true
 DUK_USE_JSON_EATWHITE_FASTPATH: true
 DUK_USE_BASE64_FASTPATH: true
+DUK_USE_HEX_FASTPATH: true
 DUK_USE_INTERRUPT_COUNTER: false
 DUK_USE_DEBUGGER_SUPPORT: false
 DUK_USE_STRHASH_DENSE: false