Resp3#parse use a jump table rather than a hash lookup + send

THe main gain is to have proper method calls rather than
dynamic `send`.

Co-authored-by: Aaron Patterson <[email protected]>

Author: byroot

.rubocop.yml

@@ -36,6 +36,9 @@ Lint/UnderscorePrefixedVariableName:
 Lint/EmptyBlock:
   Enabled: false
 
+Lint/DuplicateBranch:
+  Enabled: false
+
 Lint/MissingSuper:
   Enabled: false
 

benchmark/drivers_ruby.md

@@ -7,53 +7,53 @@ redis-server: `Redis server v=7.0.12 sha=00000000:0 malloc=libc bits=64 build=a1
 
 ```
 ruby 3.3.0 (2023-12-25 revision 5124f9ac75) [arm64-darwin23]
-             hiredis:     5402.4 i/s
-                ruby:     2877.9 i/s - 1.88x  slower
+             hiredis:     5416.0 i/s
+                ruby:     2923.7 i/s - 1.85x  slower
 
 ```
 
 ### large string x 100
 
 ```
 ruby 3.3.0 (2023-12-25 revision 5124f9ac75) [arm64-darwin23]
-             hiredis:      297.2 i/s
-                ruby:      291.2 i/s - same-ish: difference falls within error
+             hiredis:      286.7 i/s
+                ruby:      302.3 i/s - same-ish: difference falls within error
 
 ```
 
 ### small list x 100
 
 ```
 ruby 3.3.0 (2023-12-25 revision 5124f9ac75) [arm64-darwin23]
-             hiredis:     2632.0 i/s
-                ruby:     1136.1 i/s - 2.32x  slower
+             hiredis:     2596.0 i/s
+                ruby:     1155.6 i/s - 2.25x  slower
 
 ```
 
 ### large list
 
 ```
 ruby 3.3.0 (2023-12-25 revision 5124f9ac75) [arm64-darwin23]
-             hiredis:     6640.8 i/s
-                ruby:     1293.1 i/s - 5.14x  slower
+             hiredis:     6797.0 i/s
+                ruby:     1388.9 i/s - 4.89x  slower
 
 ```
 
 ### small hash x 100
 
 ```
 ruby 3.3.0 (2023-12-25 revision 5124f9ac75) [arm64-darwin23]
-             hiredis:     3419.6 i/s
-                ruby:     1129.0 i/s - 3.03x  slower
+             hiredis:     3459.8 i/s
+                ruby:     1170.4 i/s - 2.96x  slower
 
 ```
 
 ### large hash
 
 ```
 ruby 3.3.0 (2023-12-25 revision 5124f9ac75) [arm64-darwin23]
-             hiredis:     1299.3 i/s
-                ruby:     1275.3 i/s - same-ish: difference falls within error
+             hiredis:     1345.9 i/s
+                ruby:     1329.5 i/s - same-ish: difference falls within error
 
 ```
 

benchmark/drivers_yjit.md

@@ -7,53 +7,53 @@ redis-server: `Redis server v=7.0.12 sha=00000000:0 malloc=libc bits=64 build=a1
 
 ```
 ruby 3.3.0 (2023-12-25 revision 5124f9ac75) +YJIT [arm64-darwin23]
-             hiredis:     6745.7 i/s
-                ruby:     5182.0 i/s - 1.30x  slower
+             hiredis:     6775.6 i/s
+                ruby:     5212.3 i/s - 1.30x  slower
 
 ```
 
 ### large string x 100
 
 ```
 ruby 3.3.0 (2023-12-25 revision 5124f9ac75) +YJIT [arm64-darwin23]
-             hiredis:      303.5 i/s
-                ruby:      343.1 i/s - 1.13x  faster
+             hiredis:      306.1 i/s
+                ruby:      335.5 i/s - same-ish: difference falls within error
 
 ```
 
 ### small list x 100
 
 ```
 ruby 3.3.0 (2023-12-25 revision 5124f9ac75) +YJIT [arm64-darwin23]
-             hiredis:     3683.6 i/s
-                ruby:     1952.3 i/s - 1.89x  slower
+             hiredis:     3566.7 i/s
+                ruby:     1999.6 i/s - 1.78x  slower
 
 ```
 
 ### large list
 
 ```
 ruby 3.3.0 (2023-12-25 revision 5124f9ac75) +YJIT [arm64-darwin23]
-             hiredis:     6540.2 i/s
-                ruby:     2710.0 i/s - 2.41x  slower
+             hiredis:     6563.1 i/s
+                ruby:     2984.7 i/s - 2.20x  slower
 
 ```
 
 ### small hash x 100
 
 ```
 ruby 3.3.0 (2023-12-25 revision 5124f9ac75) +YJIT [arm64-darwin23]
-             hiredis:     4002.6 i/s
-                ruby:     2317.0 i/s - 1.73x  slower
+             hiredis:     3870.9 i/s
+                ruby:     2387.4 i/s - 1.62x  slower
 
 ```
 
 ### large hash
 
 ```
 ruby 3.3.0 (2023-12-25 revision 5124f9ac75) +YJIT [arm64-darwin23]
-             hiredis:     2467.1 i/s
-                ruby:     2439.0 i/s - same-ish: difference falls within error
+             hiredis:     2641.9 i/s
+                ruby:     2575.8 i/s - same-ish: difference falls within error
 
 ```
 

lib/redis_client/ruby_connection/resp3.rb

@@ -111,10 +111,35 @@ def dump_symbol(symbol, buffer)
 
     def parse(io)
       type = io.getbyte
-      method = PARSER_TYPES.fetch(type) do
+      if type == 35 # '#'.ord
+        parse_boolean(io)
+      elsif type == 36 # '$'.ord
+        parse_blob(io)
+      elsif type == 43 # '+'.ord
+        parse_string(io)
+      elsif type == 61 # '='.ord
+        parse_verbatim_string(io)
+      elsif type == 45 # '-'.ord
+        parse_error(io)
+      elsif type == 58 # ':'.ord
+        parse_integer(io)
+      elsif type == 40 # '('.ord
+        parse_integer(io)
+      elsif type == 44 # ','.ord
+        parse_double(io)
+      elsif type == 95 # '_'.ord
+        parse_null(io)
+      elsif type == 42 # '*'.ord
+        parse_array(io)
+      elsif type == 37 # '%'.ord
+        parse_map(io)
+      elsif type == 126 # '~'.ord
+        parse_set(io)
+      elsif type == 62 # '>'.ord
+        parse_array(io)
+      else
         raise UnknownType, "Unknown sigil type: #{type.chr.inspect}"
       end
-      send(method, io)
     end
 
     def parse_string(io)