What version of Go are you using (go version)?

1.9

Does this issue reproduce with the latest release?

NA

What operating system and processor architecture are you using (go env)?

processor : 1
vendor_id : GenuineIntel
cpu family : 6
model : 13
model name : QEMU Virtual CPU version (cpu64-rhel6)
stepping : 3
microcode : 0x1
cpu MHz : 2099.998
cache size : 4096 KB
physical id : 1
siblings : 1
core id : 0
cpu cores : 1
apicid : 1
initial apicid : 1
fpu : yes
fpu_exception : yes
cpuid level : 4
wp : yes
flags : fpu de pse tsc msr pae mce cx8 apic mtrr pge mca cmov pse36 clflush mmx fxsr sse sse2 syscall nx lm nopl pni cx16 hypervisor lahf_lm abm
bogomips : 4199.99
clflush size : 64
cache_alignment : 64
address sizes : 46 bits physical, 48 bits virtual
power management:

OS: Cent OS 6

What did you do?

func ExecuteSqlQuery(sqlConn *sql.DB, strQuery string, params []interface{}) (map[int]map[string]string, error) {

rows, err := sqlConn.Query(strQuery, params...)
if err != nil {
	//fmt.Println("Query execution failed.")
}
defer rows.Close()

cols, err := rows.Columns()
if err != nil {
	//fmt.Println("Failed to get columns", err)
	return nil, err
}

rawResult := make([][]byte, len(cols))
result := make(map[int]map[string]string)

dest := make([]interface{}, len(cols)) // A temporary interface{} slice
for i, _ := range rawResult {
	dest[i] = &rawResult[i] // Put pointers to each string in the interface slice
}

j := 0
for rows.Next() {
	err = rows.Scan(dest...)
	if err != nil {
		//fmt.Println("Failed to scan row", err)
		return nil, err
	}

	tmp := make(map[string]string)
	for i, raw := range rawResult {
		tmp[cols[i]] = string(raw)
	}

	result[j] = tmp
	j++
}

return result, err

}

What is the problem ?

I am executing 6 queries. The individual query is taking around 50-60 ms but when they are executed via goroutines the execution time is around 1 sec.

I expected these to be run under 60 ms too. Do I need to make any changes in the code ?