[GR-16070] Fix benchmarks.

PullRequest: truffleruby/864

Author: eregon

ci.jsonnet

@@ -473,7 +473,7 @@ local part_definitions = {
 
     cext_chunky: {
       environment+: {
-        TRUFFLERUBYOPT: "--cexts-log-load=true",
+        TRUFFLERUBYOPT: "--experimental-options --cexts-log-load",
         USE_CEXTS: "true",
       },
       setup+:

doc/contributor/cexts.md

@@ -40,7 +40,7 @@ jt cextc bench/chunky_png/oily_png
 Then follow the instructions for benchmarking above, and then try:
 
 ```bash
-$ USE_CEXTS=true TRUFFLERUBYOPT=--cexts-log-load jt benchmark bench/chunky_png/chunky-color-r.rb --simple
+$ USE_CEXTS=true TRUFFLERUBYOPT="--experimental-options --cexts-log-load" jt benchmark bench/chunky_png/chunky-color-r.rb --simple
 ```
 
 These benchmarks have Ruby fallbacks, so we should carefully check that the

tool/jt.rb

@@ -1388,8 +1388,8 @@ def build_stats_native_binary_size(*args)
 
   def build_stats_native_build_time(*args)
     log = File.read('aot-build.log')
-    log =~ /\[total\]: (?<build_time>.+) ms/m
-    Float($~[:build_time].gsub(',', '')) / 1000.0
+    build_time = log[/\[truffleruby.*\].*\[total\]:\s*([0-9,.]+)\s*ms/, 1]
+    Float(build_time.gsub(',', '')) / 1000.0
   end
 
   def build_stats_native_runtime_compilable_methods(*args)