First step toward an autoload-style lazy loader for the 499-file source
tree (current cold load ~1s wall / 340ms user-time per CLI invocation,
mostly spent sourcing files the command never calls). This commit only
measures — no behaviour change unless LP_LOAD_TRACE=1.
LP_LOAD_TRACE=1 instrumentation (scripts/source/loading/initilize_files.sh):
Wraps each in the main file-list loop with EPOCHREALTIME
before/after, writes `<elapsed_ms>\t<file_relpath>` to
$LP_LOAD_TRACE_FILE (default /tmp/libreportal-load-trace.<pid>.log).
Zero overhead when the env var is unset (one [[ test per file).
libreportal debug load-trace [cmd...]:
New `debug` CLI category. Spawns a child `libreportal <args>` (default
'help') with LP_LOAD_TRACE=1, then awk-aggregates the trace: wall vs
cumulative source time, file count, top-15 hottest files. The diff
between wall and cumulative-source = bash startup + dispatch + the
command's own work.
Used in the next phases to (a) validate that the lazy loader actually
delivers the speedup we expect and (b) flag any single file that hogs
disproportionate time (rare `heredoc | sed | base64` style work at
source time would show up here as a >10ms entry).
Signed-off-by: librelad <librelad@digitalangels.vip>
