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trace2: add dots directly to strbuf in perf_fmt_prepare() 

The initialization function of the Trace2 performance format target sets
aside a stash of dots for indenting output.  Get rid of it and use
strbuf_addchars() to provide dots on demand instead.  This shortens the
code, gets rid of a small heap allocation and is a bit more efficient.

Signed-off-by: René Scharfe <l.s.r@web.de>
Acked-by: Jeff King <peff@peff.net>
Acked-by: Jeff Hostetler <jeffhost@microsoft.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
This commit is contained in:
René Scharfe 2019-11-04 20:27:54 +01:00 committed by Junio C Hamano
parent da72936f54
commit 5c34d2f03e
1 changed files with 2 additions and 15 deletions
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17
trace2/tr2_tgt_perf.c
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@ -26,12 +26,9 @@ static int tr2env_perf_be_brief;
#define TR2FMT_PERF_REPO_WIDTH (3)
#define TR2FMT_PERF_CATEGORY_WIDTH (12)
#define TR2_DOTS_BUFFER_SIZE (100)
#define TR2_INDENT (2)
#define TR2_INDENT_LENGTH(ctx) (((ctx)->nr_open_regions - 1) * TR2_INDENT)
static struct strbuf dots = STRBUF_INIT;
static int fn_init(void)
{
int want = tr2_dst_trace_want(&tr2dst_perf);
@ -41,8 +38,6 @@ static int fn_init(void)
if (!want)
return want;
strbuf_addchars(&dots, '.', TR2_DOTS_BUFFER_SIZE);
brief = tr2_sysenv_get(TR2_SYSENV_PERF_BRIEF);
if (brief && *brief &&
((want_brief = git_parse_maybe_bool(brief)) != -1))
@ -54,8 +49,6 @@ static int fn_init(void)
static void fn_term(void)
{
tr2_dst_trace_disable(&tr2dst_perf);
strbuf_release(&dots);
}
/*
@ -138,14 +131,8 @@ static void perf_fmt_prepare(const char *event_name,
strbuf_addf(buf, "%-*.*s | ", TR2FMT_PERF_CATEGORY_WIDTH,
TR2FMT_PERF_CATEGORY_WIDTH, (category ? category : ""));
if (ctx->nr_open_regions > 0) {
int len_indent = TR2_INDENT_LENGTH(ctx);
while (len_indent > dots.len) {
strbuf_addbuf(buf, &dots);
len_indent -= dots.len;
}
strbuf_addf(buf, "%.*s", len_indent, dots.buf);
}
if (ctx->nr_open_regions > 0)
strbuf_addchars(buf, '.', TR2_INDENT_LENGTH(ctx));
}
static void perf_io_write_fl(const char *file, int line, const char *event_name,