goccy/go-jsonに変更 52453

home/isucon/webapp/go/go.mod

@@ -11,6 +11,7 @@ require (
 )
 
 require (
+	github.com/goccy/go-json v0.9.11 // indirect
 	github.com/golang-jwt/jwt v3.2.2+incompatible // indirect
 	github.com/labstack/gommon v0.3.1 // indirect
 	github.com/mattn/go-colorable v0.1.11 // indirect

home/isucon/webapp/go/go.sum

@@ -3,6 +3,8 @@ github.com/davecgh/go-spew v1.1.1 h1:vj9j/u1bqnvCEfJOwUhtlOARqs3+rkHYY13jYWTU97c
 github.com/davecgh/go-spew v1.1.1/go.mod h1:J7Y8YcW2NihsgmVo/mv3lAwl/skON4iLHjSsI+c5H38=
 github.com/go-sql-driver/mysql v1.6.0 h1:BCTh4TKNUYmOmMUcQ3IipzF5prigylS7XXjEkfCHuOE=
 github.com/go-sql-driver/mysql v1.6.0/go.mod h1:DCzpHaOWr8IXmIStZouvnhqoel9Qv2LBy8hT2VhHyBg=
+github.com/goccy/go-json v0.9.11 h1:/pAaQDLHEoCq/5FFmSKBswWmK6H0e8g4159Kc/X/nqk=
+github.com/goccy/go-json v0.9.11/go.mod h1:6MelG93GURQebXPDq3khkgXZkazVtN9CRI+MGFi0w8I=
 github.com/golang-jwt/jwt v3.2.2+incompatible h1:IfV12K8xAKAnZqdXVzCZ+TOjboZ2keLg81eXfW3O+oY=
 github.com/golang-jwt/jwt v3.2.2+incompatible/go.mod h1:8pz2t5EyA70fFQQSrl6XZXzqecmYZeUEB8OUGHkxJ+I=
 github.com/google/uuid v1.3.0 h1:t6JiXgmwXMjEs8VusXIJk2BXHsn+wx8BZdTaoZ5fu7I=

home/isucon/webapp/go/main.go

@@ -2,7 +2,6 @@ package main
 
 import (
 	"database/sql"
-	"encoding/json"
 	"fmt"
 	"io"
 	"math"
@@ -14,6 +13,7 @@ import (
 	"time"
 
 	"github.com/go-sql-driver/mysql"
+	"github.com/goccy/go-json"
 	"github.com/google/uuid"
 	"github.com/jmoiron/sqlx"
 	"github.com/labstack/echo/v4"
@@ -1866,7 +1866,9 @@ func errorResponse(c echo.Context, statusCode int, err error) error {
 
 // successResponse responds success.
 func successResponse(c echo.Context, v interface{}) error {
-	return c.JSON(http.StatusOK, v)
+	c.Response().Header().Set(echo.HeaderContentType, echo.MIMEApplicationJSONCharsetUTF8)
+	c.Response().WriteHeader(http.StatusOK)
+	return json.NewEncoder(c.Response()).Encode(v)
 }
 
 // noContentResponse

result/mysqltuner.txt

@@ -42,7 +42,7 @@
 
 -------- Storage Engine Statistics -----------------------------------------------------------------
 [--] Status: +ARCHIVE +BLACKHOLE +CSV -FEDERATED +InnoDB +MEMORY +MRG_MYISAM +MyISAM +PERFORMANCE_SCHEMA 
-[--] Data in InnoDB tables: 733.8M (Tables: 22)
+[--] Data in InnoDB tables: 734.9M (Tables: 22)
 [OK] Total fragmented tables: 0
 
 -------- Analysis Performance Metrics --------------------------------------------------------------
@@ -62,8 +62,8 @@
 [OK] NO SECURITY CVE FOUND FOR YOUR VERSION
 
 -------- Performance Metrics -----------------------------------------------------------------------
-[--] Up for: 2h 58m 25s (3M q [281.254 qps], 29K conn, TX: 1G, RX: 1G)
-[--] Reads / Writes: 59% / 41%
+[--] Up for: 3h 9m 24s (4M q [403.300 qps], 39K conn, TX: 2G, RX: 1G)
+[--] Reads / Writes: 60% / 40%
 [--] Binary logging is disabled
 [--] Physical Memory     : 3.8G
 [--] Max MySQL memory    : 10.8G
@@ -74,19 +74,19 @@
 [!!] Maximum reached memory usage: 10.8G (282.49% of installed RAM)
 [!!] Maximum possible memory usage: 10.8G (280.81% of installed RAM)
 [!!] Overall possible memory usage with other process exceeded memory
-[!!] Slow queries: 115% (3M/3M)
+[!!] Slow queries: 109% (5M/4M)
 [!!] Highest connection usage: 100%  (152/151)
-[OK] Aborted connections: 0.00%  (1/29284)
+[OK] Aborted connections: 0.00%  (1/39448)
 [!!] Name resolution is active: a reverse name resolution is made for each new connection which can reduce performance
 [--] Query cache has been removed since MySQL 8.0
-[OK] Sorts requiring temporary tables: 0% (0 temp sorts / 84K sorts)
-[OK] No joins without indexes
-[OK] Temporary tables created on disk: 0% (0 on disk / 831 total)
-[OK] Thread cache hit rate: 91% (2K created / 29K connections)
-[OK] Table cache hit rate: 99% (3M hits / 3M requests)
+[OK] Sorts requiring temporary tables: 0% (0 temp sorts / 141K sorts)
+[!!] Joins performed without indexes: 38
+[OK] Temporary tables created on disk: 0% (0 on disk / 848 total)
+[OK] Thread cache hit rate: 91% (3K created / 39K connections)
+[OK] Table cache hit rate: 99% (4M hits / 4M requests)
 [OK] table_definition_cache (2000) is greater than number of tables (349)
 [OK] Open file limit used: 0% (1/10K)
-[OK] Table locks acquired immediately: 100% (39 immediate / 39 locks)
+[OK] Table locks acquired immediately: 100% (50 immediate / 50 locks)
 
 -------- Performance schema ------------------------------------------------------------------------
 [--] Performance_schema is activated.
@@ -103,10 +103,10 @@
 [--] InnoDB is enabled.
 [--] InnoDB Thread Concurrency: 0
 [OK] InnoDB File per table is activated
-[OK] InnoDB buffer pool / data size: 1.0G / 733.8M
+[OK] InnoDB buffer pool / data size: 1.0G / 734.9M
 [!!] Ratio InnoDB log file size / InnoDB Buffer pool size (9.375%): 48.0M * 2 / 1.0G should be equal to 25%
 [!!] InnoDB buffer pool <= 1G and Innodb_buffer_pool_instances(!=1).
 [--] Number of InnoDB Buffer Pool Chunk: 8 for 8 Buffer Pool Instance(s)
 [OK] Innodb_buffer_pool_size aligned with Innodb_buffer_pool_chunk_size & Innodb_buffer_pool_instances
-[OK] InnoDB Read buffer efficiency: 99.98% (232535408 hits/ 232585535 total)
+[OK] InnoDB Read buffer efficiency: 99.98% (297311134 hits/ 297370762 total)
 [!!] InnoDB Write Log efficiency: 0% (0 hits/ 0 total)