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h2o: Reduce the size of the default HTTP2 buffer

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The initial value takes 80kB of memory for each HTTP/2 connection
which is a lot on small devices. Using 8kB instead saves a fair
amount of memory without sacrificing performance.

Signed-off-by: Remi Gacogne <remi.gacogne@powerdns.com>
This commit is contained in:
Remi Gacogne 2023-06-14 15:22:03 +02:00 committed by Rosen Penev
parent 1246b81bc2
commit b53a83815f
1 changed files with 11 additions and 0 deletions
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11
libs/h2o/patches/800-smaller-write-buffer.patch Normal file
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@ -0,0 +1,11 @@
--- a/include/h2o/http2_internal.h
+++ b/include/h2o/http2_internal.h
@@ -33,7 +33,7 @@
typedef struct st_h2o_http2_conn_t h2o_http2_conn_t;
typedef struct st_h2o_http2_stream_t h2o_http2_stream_t;
-#define H2O_HTTP2_DEFAULT_OUTBUF_SIZE 81920 /* the target size of each write call; connection flow control window + alpha */
+#define H2O_HTTP2_DEFAULT_OUTBUF_SIZE 8192 /* the target size of each write call; connection flow control window + alpha */
#define H2O_HTTP2_DEFAULT_OUTBUF_SOFT_MAX_SIZE 524288 /* 512KB; stops reading if size exceeds this value */
/* hpack */