Add tail_call_interp to the bench configuration file

[maurycy]

Fixes #463

[maurycy]

@Fidget-Spinner Voilà: https://gist.github.com/maurycy/43c551e060022b0febe129358fa6bbed

The command:

CC=clang-19 CXX=clang++-19 /home/maurycy/pyperformance/.venv/bin/python /home/maurycy/pyperformance/dev.py compile /tmp/tail.conf main

The line inside the log:

2026-04-07 13:26:11,521: + /home/maurycy/cpython-main/configure --prefix /home/maurycy/bench_tmpdir/prefix --with-lto --enable-experimental-jit=no --with-tail-call-interp

and:

2026-04-07 13:26:26,533: checking for --with-tail-call-interp... yes

For:

--- /home/maurycy/pyperformance/doc/benchmark.conf.sample	2026-04-07 11:19:11.562370995 +0000
+++ tail.conf	2026-04-07 13:24:59.687990336 +0000
@@ -13,7 +13,7 @@
 
 [scm]
 # Directory of CPython source code (Git repository)
-repo_dir = ~/cpython
+repo_dir = ~/cpython-main
 
 # Update the Git repository (git fetch)?
 update = True
@@ -52,7 +52,7 @@
 jit = no
 
 # Tail-calling interpreter?
-tail_call_interp = False
+tail_call_interp = True
 
 # The space-separated list of libraries that are package-only,
 # i.e., locally installed but not on header and library paths.
@@ -82,13 +82,13 @@
 
 [run_benchmark]
 # Run "sudo python3 -m pyperf system tune" before running benchmarks?
-system_tune = True
+system_tune = False
 
 # --manifest option for 'pyperformance run'
 manifest =
 
 # --benchmarks option for 'pyperformance run'
-benchmarks =
+benchmarks = json_dumps
 
 # --affinity option for 'pyperf system tune' and 'pyperformance run'
 affinity =

[Fidget-Spinner]

Wow, excellent! Thanks for adding tests as well.